Magnetic starter PML-1100. Purpose, device, principle of operation

Electromagnetic starters PML

TU3420-091-05758109-2016. Electromagnetic starters of the PML series (hereinafter referred to as “starters”) are intended for use as switching

devices in electric drive control circuits, mainly in stationary installations, for remote starting by direct connection to the network, stopping and reversing three-phase asynchronous electric motors with a squirrel-cage rotor at voltages up to 660 V AC with a frequency of 50 and 60 Hz. The starters are equipped with thermal relays of the RTL TU3425-041 -05758109-2008 series, which provides protection of controlled electric motors from overloads of unacceptable duration and from currents arising when one of the phases is broken.

Optimal operating conditions, absence of noise and increased operational reliability are ensured by the use of special manufacturing technology for the magnetic contactor system. Wide possibilities for the layout of panels due to the possibility of mounting devices both vertically and turning to the right/left by 20°. Possibility of operation in harsh Russian conditions at ambient temperatures from -40°C to +55°C. Possibility of use in various operating conditions due to the enclosure with degree of protection IP54.

Symbol structure

Starter PML-Х1Х2Х3Х4Д-Х5А-Х6АС-(Х7А)-УХЛ3-Б-КЭАЗ

Actuator	— Product group
PML	— Series
X1	- A number indicating the size of the starter depending on the rated current: 1 - 10 A and 16 A, 2 - 25 A and 32 A, 3 - 40 A, 4 - 63 A, 5 - 100 A
X2	— A number indicating the intended use: 2 — irreversible
X3	— A number indicating the design according to the degree of protection: 2 — IP54 with “Start” and “Stop” buttons
X4	— A number indicating the number and design of auxiliary circuit contacts:	40, 63, 100
0	1 "z"	1 "z" + 1 "r"
1	1 "r"

D - Letter indicating starters with rated current: 16 A - for 1st value, 32 A - for 2nd value, 100 A - for 5th value X5 - Rated current, A (10, 16, 25, 32, 40, 63, 100) X6— Control circuit voltage, V and type of current X7— Current setting range of the relay, AUHL3— Designation of the type of climatic version according to GOST 15150B— Letter indicating the wear resistance version KEAZ— Trademark

An example of writing the designation of a starter with a rated current of 10 A, wear resistance version B, irreversible, degree of protection IP54, with 1 “z” auxiliary contact, with a switching coil for voltage 220 V with a frequency of 50 Hz, with a relay current setting range (7-10 A ) when ordering it and in the documentation of another product: Starter PML-1220-10A-220AS-(7-10 A)-UHL3-B-KEAZ

Starter PML-Х1Х2Х3Х4Д-Х5А-Х6АС-(Х7А)-УХЛ2-Б-КЭАЗ

Actuator	— Product group
PML	— Series
X1	- A number indicating the size of the starter depending on the rated current: 1 - 10 A and 16 A, 2 - 25 A, 3 - 40 A, 4 - 63 A
X2	— A number indicating the intended design: 2 — non-reversible, 6 — reversible with electrical and mechanical interlocking, 7 — star-delta
X3	— Execution by the presence of buttons: 1 — with a “Relay” button, 2 — with “Start” and “Stop” buttons, 3 — with “Start” “Stop” buttons and a signal lamp (manufactured only for voltages 127, 220 and 380 V , 50 Hz)
X4	— Design according to the number and purpose of auxiliary circuit contacts:	40, 63
0	1 "z"	1 "z" + 1 "r"
1	1 "z" + 2 "r"

D - With a rated current of 16 A - for 1 value; with reduced weight and dimensions - for size 3 15150B— Letter indicating the wear resistance version KEAZ— Trademark

An example of writing the designation of a starter for a rated current of 10 A, wear resistance version B, irreversible, degree of protection IP54, with “Start”, “Stop” buttons and a signal lamp, with 1 “z” auxiliary contact, with a switching coil for a voltage of 220 V frequency 50 Hz, with the relay current setting range (7-10 A) when ordering it and in the documentation of another product: Starter PML-1230-10A-220AS-(7-10a)-UHL2-B-KEAZ

Assortment of PML starters

Accessories for PML contactors and starters

Specifications

Parameter name	Parameter designation
Series	PML-1210 PML-1230	PML-1611 PML-1621 PML-1631	PML-1210D PML-1230D	PML-1611D PML-1621D PML-1631D	PML-2210 PML-2230	PML-2611 PML-2621 PML-2631
Type of main circuit current	variable
Rated current, A	10		16		25
Motor power (AC-3) at 380 V 50 Hz, kW	4,0		7,5		11
Auxiliary contacts “z” - normally open “r” - normally open	1 "z"	1 "z" + 2 "r"	1 "z"	1 "z" + 2 "r"	1 "z"	1 "z" + 2 "r"
Execution	irreversible	reverse	irreversible	reverse	irreversible	reverse
Type of climate control	UHL2
Degree of protection	IP54
Design for switching wear resistance, million cycles (AS-3)	B-1.5	B-1.0
Design for mechanical wear resistance, million cycles	B-10
Maximum switching frequency without load/with load, switchings per hour (AC-3)	3600/2400		3600/1200
Rated operating current, A (AC-3) up to 380 V	10		16		23
Rated operating current, A (AC-3) at 660 V	5		10		15
Rated operating current, A (AS-1)	20		32		40
Rated operating current, A (AC-4) up to 380 V	3,5		7,7		8,5
Rated operating current, A (AC-4) at 660 V	1,5		3,8		4,4
Rated voltage of the main circuit, V	up to 660
Type of control circuit current	variable
Rated control circuit voltage, V	24, 36, 42, 48, 110, 120, 127*, 220*, 240, 380*, 400, 415, 440, 480, 660
Coil power consumption
switching on, VA	70				110
retention, VA	8				11
Rated insulation voltage, V	660
Dimensions
Dimensions (HxWxD), mm	160x87x116.5	280x123x143	185x101x134	280x123x143	185x101x134	280x123x143
Installation, mm	140 (2 M5 screws)	260 (2 M5 screws)	165 (2 M5 screws)	260 (2 M5 screws)	165 (2 M5 screws)	260 (2 M5 screws)
Weight no more than, kg	1,04	2,15	1,2	2,7	1,2	2,7
	1,13	2,23	1,29	2,77	1,29	2,77
	2,27	2,85	2,85

* Rated control circuit voltage for starters PML-1230, PML-1631, PML-1230D, PML-1631D, PML-2230, PML-2631

Parameter name	Parameter designation
Series	PML-3210 PML-3230	PML-3210D PML-3220D PML-3230D	PML-3611D PML-3621D PML-3631D	PML-3610 PML-3620 PML-3630	PML-4210 PML-4230	PML-4610 PML-4620 PML-4630
Type of main circuit current	variable
Rated current, A	40				63
Motor power (AC-3) at 380 V 50 Hz, kW	18,5				30
Auxiliary contacts “z” - normally open “r” - normally open	1 "z" + 1 "r"	1 "z"	1 "z" + 2 "r"	1 "z"	1 "z" + 1 "r"	1 "z"
Execution	irreversible		reverse		irreversible	reverse
Type of climate control	UHL2
Degree of protection	IP54
Design for switching wear resistance, million cycles (AS-3)	B-1.0
Design according to M0V3U М U0, 1ГГ\1Л mechanical wear resistance, million cycles	B-10
Maximum switching frequency without load/with load, switchings per hour (AC-3)	3600/1200
Rated operating current, A (AC-3) up to 380 V	34				53
Rated operating current, A (AC-3) at 660 V	21				43
Rated operating current, A (AS-1)	60				80
Rated operating current, A (AC-4) up to 380 V	18,5				28
Rated operating current, A (AC-4) at 660 V	9				14
Rated voltage of the main circuit, V	up to 660
Type of control circuit current	variable
Rated control circuit voltage, V	24, 36, 42, 48, 110, 120, 127*, 220*, 240, 380*, 400, 415, 440, 480, 660
Coil power consumption
switching on, VA	200
retention, VA	20
Rated insulation voltage, V	660
Dimensions
Dimensions (HxWxD), mm	280x164x166	280x164x170	280x164x166	258x175x309	280x164x166	258x175x309
Installation, mm	260 (2 M5 screws)			165x165 (4 M6 screws)	260 (2 M5 screws)	165x165 (4 M6 screws)
Weight no more than, kg	3,1	2,4	3,24	6	3,11	6
	3,15	2,42	3,24	6,08	3,16	6,08
	2,44	3,3	6,12	6,12

* Rated control circuit voltage for starters PML-3230, PML-3230D, PML-3630, PML-3631D, PML-4230, PML-4630

Parameter name	Parameter designation
Series	PML-1220	PML-1220D	PML-2220	PML-2220D	PML-3220	PML-4220	PML-5220D
Type of main circuit current	variable
Rated current, A	10	16	25	32	40	63	100
Motor power (AC-3) at 380 V 50 Hz, kW	4,0	7,5	11	15	18,5	30	45
Auxiliary contacts “z” - normally open “r” - normally open	1 "z"				1 "z" + 1 "r"
Execution	irreversible
Type of climate control	UHL3
Degree of protection	IP54
Execution according to switching HJnULUL 1 UHKUL. 1 Vlf NJIH CYCLIV (AC-3)	B-1.5	B-1.0
MlPG|P1-1(=>1-1ы(=>PG1 V \\L IKJJ 1PSPIS 1 l\J mechanical wear resistance, million cycles	B-10						B-5
Maximum switching frequency without load/with load, switchings per hour (AC-3)	3600/2400	3600/1200					3600/750
Rated operating current, A (AC-3) up to 380 V	10	16	23	28	34	53	86
Rated operating current, A (AC-3) at 660 V	5	10	15	18	21	43	56
Rated operating current, A (AS-1)	20	32	40	50	60	80	120
Rated operating current, A (AC-4) up to 380 V	3,5	7,7	8,5	12	18,5	28	44
Rated operating current, A (AC-4) at 660 V	1,5	3,8	4,4	7,5	9	14	21,3
Rated voltage of the main circuit, V	up to 660
Type of control circuit current	Variable
Rated control circuit voltage, V	24, 36, 42, 48, 110, 120, 127, 220, 240, 380, 400, 415, 440, 480, 660
Coil power consumption
switching on, VA	70		110		200
retention, VA	8		11		20
Rated insulation voltage, V	660
Dimensions
Dimensions (HxWxD), mm	166x88x140		185x101x142		312x180x181
Installation, mm	150 (2 M5 screws)		165 (2 M5 screws)		200x105 (4 M6 screws)
Weight no more than, kg	1,3		1,5	1,6	2,4	3,2	4,2

Overall and installation dimensions of PML starters of climatic version UHL3

Starters PML-1220, PML-1220D for rated currents of 10 and 16 A in a plastic shell

Starters PML-2220, PML-2220D for rated currents of 25 and 32 A in a plastic shell

Starters PML-3220, PML-4220, PML-5220D for rated currents of 40, 63 and 100 A in a metal shell

Overall and installation dimensions of climate control starters UHL2

Irreversible starters 1 and 2 sizes in a plastic shell

Starter type	A	A1	IN	L	H	H1	H2	Screw for fastening	Weight, kg
PML-1210	140 ± 0,4	46 ± 0,3	87 ± 1	160 ± 1	116,5 ± 1		18 ± 0,3	M5 - 6g 2 screws	1,04
PML-1220									1,04
PML-1230						124,5 ± 1			1,13
PML-1210D	165 ± 0,4	52 ± 0,3	101 ± 1	185 ± 1	134 ± 1		19 ± 0,3		1,20
PML-1220D									1,20
PML-1230D						142 ± 1			1,29
PML-2210									1,20
PML-2220									1,20
PML-2230						142 ± 1			1,29

Reversing starters 1 and 2 sizes in a plastic shell

Starter type	A	A1	B	B1	H	H1	H2	Screw for fastening	Weight, kg
PML-1611	260 ± 0,7	46 ± 0,3	123± 1	280±1	130,5±1		18 ± 0,3	M5 - 6g 2 screws	2,15
PML-1621									2,23
PML-1631						136,5 ± 1			2,27
PML-1611D		52 ± 0,3			143±1		19 ± 0,3		2,70
PML-1621D									2,77
PML-1631D						149 ± 1			2,85
PML-2611						149 ± 1			2,70
PML-1621									2,77
PML-1631									2,85

Irreversible starters of 3 and 4 sizes in a shell, reversible starters of 3 sizes with reduced weight and dimensions in a plastic shell

Starter type	A	A1	IN	B1	H	H1	H2	Screw for fastening	Weight, kg
PML-3210		34,5±0,5		60,5±0,5		31 ± 0,5	59 ± 0,5	M5 - 6g 2 screws	3,100
PML-3220									3,130
PML-3230					170,5 ± 1				3,156
PML-3210D									2,400
PML-3220D									2,420
PML-3230D					170,5 ± 1				2,440
PML-3611D									3,200
PML-3621D									3,240
PML-3631D					170,5 ± 1				3,300
PML-4210	42 ± 0,5	42 ± 0,5				44 ± 0,5			3,110
PML-4220									3,140
PML-4230					170,5 ± 1				3,160
PML-1720	54 ± 0,5	30 ± 0,5	54 ± 0,5	54 ± 0,5		26 ± 0,5	56 ± 0,5		3,300
PML-1720D									3,300

Reversible starters 3 and 4 sizes in a metal shell

Starter type	Screw for fastening	Weight, kg
PML-3610	M5 - 6g 4 screws	6,00
PML-3620		6,08
PML-3630		6,12
PML-4610		6,00
PML-4620		6,08
PML-4630		6,12

Catalog PML starters (.pdf, 2.53 MB)

Operating manual for electromagnetic starters of the PML series (.pdf, 1.24MB)

Operating principle

This multi-contact electromagnetic relay works as follows:

1. Using a button, an electric current with a specified voltage is supplied to the control coil;
2. The current passing through the turns of the coil leads to magnetization of the W-shaped fixed core of the base;
3. The magnetized lower fixed core attracts the magnetic circuit located on the movable cross-arm, compressing the elastic return spring;
4. As a result of the attraction of the traverse core to the base magnetic circuit, it is closed by the spring-loaded fixed power contacts;
5. As a result of the pairwise closure of the movable contacts of the traverse of the fixed power contacts, the load is switched on.

Magnetic starter
Disconnection of the starter and, accordingly, the load connected to it occurs when the supply of electric current to the control coil is stopped: the lower core is demagnetized and ceases to attract the upper one, as a result of which the traverse with contacts under the action of an expanding elastic spring disconnects the power contacts.

On a note. Under normal conditions, a working starter makes clicking sounds of the same duration when turned on and off. If the device makes different sounds, then there may be various malfunctions of its internal components.

Additional blocks – PKL contact attachments

To obtain expanded capabilities of PKL contactors and PML magnetic starters used in electrical circuits, if it is necessary to increase the number of switched elements in certain systems, additional PKL contact blocks are used. They are available in five different versions in the first and second dimensions, which differ in the number of spring-loaded contacts in the form of bridges. The first dimension corresponds to two such groups of contacts, and the second – four groups of contacts.

Additional blocks for controlling their contacts must be inserted into the guides located in the head part of the PML starter. In this case, the protruding traverse from the contactor engages with the contacts of the block. The wires are connected to the blocks using screw terminals. The units can be operated at an alternating voltage of 660 V, as well as at a direct voltage with a maximum value of 400 V, providing up to 1,600,000 operations.

terms of Use

The electromagnetic starter is designed to operate at a temperature of +/-40 degrees Celsius, with a degree of environmental pollution of 3 points and at an altitude of no more than 2 thousand meters. Its normal operating position is to be mounted on a vertical plane using the terminals of the switching coil up and down with screws or by snapping a standard rail. Deviation from the top in any direction is acceptable.

Mandatory use with voltage limiter

The device may only be used in accordance with the instructions. Only in this case is it possible to achieve a positive effect from interacting with it and at the same time maintain its performance while protecting the controlled electric motor from overload and electric current that appears at the moment of a break in one phase.

You might be interested in: Installation of an electric meter

Use according to instructions

Rules of care

In order to maintain a magnetic starter in appropriate conditions, you need to be well aware of all the faults that such a unit most often encounters. This concerns a sharp increase in the temperature of parts and strong humming of the equipment.

Overheating is mainly associated with inter-turn short circuits of the coil, and in this case it is impossible to do without replacing it. Heating of parts can occur due to increased voltage in the electrical network.

A strong hum from the unit is observed in many cases. Among the main reasons is poor fit of the armature to the core due to contamination or damage to their surface. Other factors include jamming of the moving part and a decrease in the rated voltage in the network (by 15% or more).

Negative consequences can only be avoided with timely care. The huge advantage is that such a unit does not require expensive maintenance. The technician just needs to prevent dirt, dust and moisture from getting into the device. The tightness of the clamps and the condition of the contacts must be checked regularly. In addition, you can resort to a certain list of measures often used by electrical engineers.

What are these switches for and where are they used?

The domestic industry produces a large number of different contactors and magnetic starters.
Basically, they are combined into series according to certain common characteristics. One of these PML series combines small-sized switching devices. They operate in the current range of 9 - 95 A and are intended for widespread use in industry in networks with voltages up to 400 V industrial frequency. They should mainly be used to control asynchronous motors (modes corresponding to category AC-3), in electrical circuits with incandescent lamps and other lighting systems that use ballasts to control lamps, for switching circuits with electric heaters, as well as for switching inductive loads in modes , corresponding to category AC-1. The contactors, which can be installed on 35 and 72 mm rails using a securely attached steel base, correspond to dimensions 3 - 5. Their operating current load depends on the altitude above sea level and should be reduced by ten percent when placed above 2 km. With a warranty period of three years, contactors can last fifteen years or longer.

Options

The main parameters of such devices include:

• Switching wear resistance is a characteristic indicating the maximum number of on/off cycles the device can withstand without repairing or replacing contacts;
• Number and type of contacts;
• Rated current for which the device contacts are designed;
• Voltage supplied to the control coil;
• Degree of protection (IP) from moisture and dust;
• Availability of control buttons, signal lamp;
• Availability of reverse function and built-in thermal relay;
• Dimensions and weight;
• Type of fastening (on DIN rail, using screws or bolts).

On a note. The main characteristics of the starter can be found by deciphering its markings.

Functionality

Below are typical functions performed by magnetic starters, which are far from exhaustive of their applications:

• Control of asynchronous electric motors in drives of industrial mechanisms.
• Turning on external (street) city lighting, external and internal lighting of industrial facilities.
• Switching of electric heating devices (heating elements or infrared heaters) of electric heating systems.
• Use as triggers in industrial automation circuits.

The choice of magnetic starters is made when designing control and automation circuits, or during their repair, when to replace an outdated or missing device it is necessary to select its analogue.