Siemens CLM0C Instructions de montage

Installation Sheet

January, 2016

Supersedes February, 2013

E87010-A0104-T003-A6-CLM0

Lighting and Heating Contactor

30 Amp 2, 3, 4, 5 Pole

Magnetically Latched

A5E31166447A-002

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092

Table 1 – Contactor Ratings

Contactor Rating

Catalog Number

CLM0C

Cont. Current Rating, Amp.

Tungsten

Max. Volts, line-line

480

Max. Volts, line-Neutral

277

Ballast

Max. Volts, line-line

600

Max. Volts, line-Neutral

346

Heating

Max. Volts, line-line

600

Max. Volts, line-Neutral

346

Auxiliary Contact Ratings (A600, R300)

Voltage

Continuous

Make

Break

120-600 VAC

10A

7200VA

720VA

72-120 VAC

10A

60A

720VA

28-72 VAC

10A

60A

10A

28-300 VDC

28VA

Theory of Operation

Each contactor contains a permanent magnet built into its struc-

ture that will maintain the contactor in its energized state inde-

nitely without using control power. When energized, DC voltage

is applied to produce a magnetic eld that reinforces the polarity

of the permanent magnet and the contactor closes. Immediately,

the current to the coil is disconnected by the coil clearing aux-

iliary contact. In order to open the contactor, it is necessary to

create a eld through the OFF coil in the reverse direction to the

permanent magnet. This momentarily cancels the magnetic at-

traction and the contactor drops out.

Magnetically latched CLM lighting and heating contactors can

control tungsten, uorescent and metal vapor lamp or heating

loads. (Table 1 below shows the voltage and current rating for

various loads). Each contactor and its associated load should be

protected against short circuits by a suitable branch circuit pro-

tective device selected in accordance with the National Electric

Code (NEC).

Description

AC Coil Data

Poles

Inrush VA

Dropout VA

2-4

410

5. 410 40

Care should be taken when servicing that leads do not be-

come changed from their factory installed terminals, or im-

proper operation and possibly permanent damage to the

contactor could result.

CAUTION: Do not apply AC voltage directly to the coil

terminals of this device! The permanent magnet will be

demagnetized and the rectier will be damaged if alter-

nating current or wrong polarity direct current is ap-

plied directly to the coil.

Each CLM contactor has an electronic control module

“CLMKCMR” which is used to energize and close the

contactor and for the release circuit. It is designed for short

time actuation of 1-3 cycles only. All coils are designed with

a small wattage resistor in addition to a diode at coil voltages

higher than 120 volts. Remote solid state switching devices

have ‘off state’ leakage currents. They may also pass utility

transient voltages through to the device electronics. The low

level ‘off state’ voltages are insufcient to actuate the contactor

but large enough to burn out the resistors. Normal actuating

voltages are quickly disconnected from the coils and control

module by the latch clearing contacts. Coil and module

failures are possible when used with solid state relays and

PLC outputs. 24-volt systems are ok to use, but 120 volts

and above should be discouraged. If higher voltages cannot

be avoided, an interposing relay should be used.

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Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E31166447A-002

Power Circuit Terminals

Wire Size #14 AWG -#8 AWG

Wire with copper conductors only, unless terminals are

marked “AL-CU”

(Wire with conductors rated 75 °C.If conductors rated

higherthan 75 °C are used, their size must be based on

the ampacity values for 75 °C conductors. Terminal

torque values are shown in Table 2.)

Installation - Be sure power is off

The nameplate ratings of the contactor must agree with the

power supply and the rating of the load. Contactor mounting

should be solid to prevent vibration. When the contactor is

provided with a channel iron base, grout the base in place.

The preferred and recommended mounting position of the con-

tactor is in a vertical plane. Before making any connections,

be certain that all leads to be handled are de-energized. With

power off, operate contactors, relays and interlocks to see that

they work freely. See that all terminals and current carrying

connections are clean and tight. For electrical connection, wire

per one of the schematics shown in Fig. 2 thru 4 depending on

the desired control.

(Magnetically-latched contactors are equipped with coils

designed for intermittent duty only. Faulty coil action can

be caused by a defective coil or damaged control module.

Replacement of both is recommended when the contactor

will not pull in or drop out. Coil replacement for the purpose of

changing the control voltage rating does not require auxiliary

contact or control module replacement.)

Table 2 - Torque

Location (Qty.)

Driving Torque

(lb.-in.)

Figure 1

Item

Cover Screw (2)

8-9

Coil Wire Connector (2)

8-9

Stationary Contact Screw (2/pole)

8-9 10

Main Power Connector (2/pole)

18-20

Fig. 1

CAUTION: Avoid attempting to manually latch or delatch the contactor.

1 2 3 4

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Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E31166447A-002

Auxiliary Contact

A maximum of two auxiliary units can be installed in the re-

cesses of each contactor (see Fig. 5 for location and bottom of

Table 4 for the auxiliary units catalog numbers and their contact

conguration). Auxiliary units mount by means of spring clip

and retainer screw. To remove the unit rotate the retainer screw

several times (counter-clockwise) and then slide the auxiliary

contact unit out of the recess.

Fig. 2 Connection Diagram for Common/Separate Control

with Momentary Pushbutton or ON-OFF Selector

Switch

Table 3 - Coil

Voltage

VAC

Freq.

Part Number

2-4 Pole 5 Pole

60 Hz

CLMC4C024

CLMC5C024

110/120

50/60 Hz

CLMC4C120

CLMC5C120

208

60 Hz

CLMC4C208

CLMC5C208

220/240

50/60 Hz

CLMC4C240

CLMC5C240

277

60 Hz

CLMC4C277

CLMC5C277

440/480

50/60 Hz

CLMC4C480

CLMC5C480

550/600

50/60 Hz

CLMC4C600

CLMC5C600

CAUTION -

All control wiring for contactor operation must only be made to

the coil isolation contact terminals #2, #3 and L2 terminal con-

nection points. Wiring made to any other terminal points will

burn out the coil and diode. If a coil burnout occurs, both the

coil and the diode must be replaced.

Coil Replacement – refer to Figure 1, Table 3.

Loosen the two screws at each side of the upper base and re-

move the wire connections. Loosen the assembly screws (1).

Pull the loosened upper base structure (2) forward. Unplug

the coil (3) from the upper base, plug in a new coil and re-

place the upper base structure while depressing the kick-out

springs (4) to ensure they set in the molded seats in the cross-

bar (5). Reconnect the four coil leads. Tighten the assembly

screws referring to Table 2. Mechanically operate the unit to

ensure there is no binding of the crossbar.

Contact Inspection – refer to Figure 1

Loosen the two arc chute screws (6) located immediately

above and below the nameplate and remove the arc chute

(7). The contacts (8) are visible. Re-tighten the screws per

Table 2.

Contact Wear and Replacement – refer to Figure 1,

Table 4.

CAUTION: Install arcbox prior to energization

Contacts are designed for a long service life based on a spe-

cic electrical load under normal service and environmental

conditions. If any one of these factors is altered, a shorter ser-

vice life or a breakdown will result. Contactors are subject to

both mechanical and electrical wear during their operation. In

most cases mechanical wear is insignicant. The erosion of

the contacts is due to electrical wear. During arcing, material

from each contact is vaporized and blown away from the useful

contacting surface.

Note: When contact replacement is required, it is necessary

to replace both stationary and moving contacts plus moving

contact overtravel springs. After replacement, manually oper-

ate switch to be sure binding does not occur.

After removing the arc chute (7) and with replacement contacts

in hand, compress the overtravel spring (9) and remove the

moving contact (8) from the crossbar (5). Remove any power

connections. Remove screws (10) and lift out the stationary

contact carriers (11). The new contacts are then installed by

reversing the above procedure and referencing Table 2 for

torque specications. Moving contacts should be free to move,

overtravel spring seated, and the crossbar free to move when

the arc chute is in position. Silver cadmium oxide contact but-

tons require NO dressing or lubrication during their life.

Magnet - Armature Assembly

Self alignment and permanent air gap features of the magnet

armature make replacement unnecessary. Mating pole face

surfaces should be kept clean.

OFF ON

VOLTAGE

CONTROL

(L1)

(L2)

ON OFF

( + )

( - )

BLACK( + )

( - )

ACAC

RED

WHITE

CLMFCCK11

RED

CLMFCAK11

OFF

RED

CLM CONTACTOR

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Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E31166447A-002

Fig. 3 Connection for 2 Wire Control Fig. 4 Connection for Hand/Off/Auto Control

Fig. 5 Dimension Drawing 30 Amp Device

VOLTAGE

CONTROL

L1 L2

ON OFF

( + )

( - )

BLACK ( + )

( - )

ACAC

RED

WHITE

CLMFCCK11

RED

CLMFCAK11

OFF

RED

REMOTE DEVICE

CR CR

CLM CONTACTOR

VOLTAGE

CONTROL

ON OFF

( + )

( - )

BLACK ( + )

( - )

ACAC

RED

WHITE

CLMFCCK11

RED

OFF

RED

REMOTE

CR CR

(L1)

(L2)

H AO

DEVICE

SELECTOR

SWITCH

CLM CONTACTOR

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Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E31166447A-002

Short-Circuit

Protective Device

(SCPD)

Max.

Rating

SCPD

Circuit

Breaker

Interrupting

Rating

Short-Circuit

Rating

Current Voltage

Class H Fuse 60A - 5,000A600V

Class J Fuse 60A - 100,000A600V

Class R Fuse 60A - 100,000A600V

Class T Fuse 60A - 100,000A600V

Thermal/Mag.

Type CB

50A14,000A

18,000A

600V

22,000A

480V

25,000A

30,000A

480V

Thermal/Mag.

Type CB

50A

25,000A

600V

65,000A

480V

100,000A

480V

65,000A

50,000A

600V

Thermal/Mag.

Type CB

50A150,000A100,000A480V

Storage

Electrical control equipment which is to be stored prior to its

installation, should be checked before placing in storage for

possible damage during transit. It should then be repacked

and stored in a location which is clean and dry.

When storage is in or near buildings under construction, pro-

vide covers to protect the equipment against dust, moisture

and falling objects.

Apparatus stored for long periods may corrode. Damage,

while stored, will be minimized by maintaining the best

possible storage conditions, and by periodically inspect-

ing the equipment and arresting the progress of corro-

sion and other forms of deterioration which may be found.

A small amount of heat will stop corrosion that occurs from

moisture due to condensation.

Table 4 – Renewal Parts

Contactor Pole Combination Part Number

Contact Kit, 2-Pole CLMCCK02

Contact Kit, 3-Pole CLMCCK03

Contact Kit, 4-Pole

CLMCCK04

Contact Kit, 5-Pole CLMCCK05

Latch Coil Clearing Auxiliary CLMFCCK11

Latch Contactor Control Module CLMKCMR

Auxiliary Contact 1 NO 1 NC CLMFCAK11

Auxiliary Contact 2 NO 0 NC

CLMFCAK20

Auxiliary Contact 0 NO 2 NC

CLMFCAK02

1Inverse-Time Circuit Breaker

2Inverse-Time Current-Limiting Breaker

Short Circuit Ratings

This lighting contactor is suitable for use on a circuit capa-

ble of delivering not more than the current (rms symmetrical

amperes) shown in circuits rated not more than the voltage

shown below.

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Troubleshooting

Problem Cause Corrective Action

Contacts

Contacts Chatter Low VoltageCheck supply voltage, especially during starting.

Check coil voltage rating. Increase voltage or change

coil rating as required.

Welding Abnormal Inrush Current

Insufficient Contact Pressure

Low Voltage Preventing Magnet

from Sealing

Foreign Matter Preventing

Contacts from Closing

Short Circuit

Excessive Inrush Current

Check for grounds, shorts, or excessive load current.

Replace contacts and springs, check contacts for

abnormal wear or damage.

Check supply voltage to coil, especiallyfor momentary

dip during startup.

Clean contacts with LPS CFC-Free Electro Contact

Cleaner. Contacts used at low current and voltage

should be cleaned with Freon.

Remove fault and check to be sure fuse or breaker

size is correct.

Use next larger size contactor.

Short Contact Life or

Overheating

Filing or Dressing

Interrupting Excessively High

Currents

Weak Contact Pressure

Foreign Matter on Contact

Surface

Short Circuit or Ground Fault

Loose Connection in Power

Circuit

DO NOT FILE SILVER CONTACTS. Rough spots or

discoloration will not harm contacts of impair their

efficiency.

Check for grounds, shorts or excessive currents.

Use larger size contactor.

Replace contacts and springs, check contacts for

abnormal wear or damage.

Clean contacts with LPS CFC-Free Electro Contact

Cleaner. Take steps to reduce entry of foreign matter

into enclosure.

Remove fault and check to be sure fuse or breaker

size is correct.

Clean and tighten.

Coils

Open Circuit

Overheated Coil

Mechanical Damage

Incorrect Coil

Caution -

All control wiring for contactor operation must only be

madeto the coil isolation contact terminals #2 and #3,

and L2 terminal connection points. Wiring made to any

other terminals will burn out the coil and diode. If a coil

burnout occurs, both the coil and diode must be

replaced.

Replace with new coil. Handle and store new coils

carefully.

Check coil rating and replace with correct coil.

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E31166447A-002

Troubleshooting continued

Problem Cause Corrective Action

Magnetic and

Mechanical Parts

Each CLM contactor has an electronic control module

‘CLMKCMR’ which is used to energize and close the

contactor andfor the release circuit. It is designed for

short time actuation of 1-3 cycles only. All coils are

designed with a small wattage resistor in addition to a

diode at coil voltage higher than 120 Volts. Remote

solid state switching devices have ‘off state’ leakage

currents. They may also pass utility transient voltages

through to the device electronics. The low level ‘off

state’ voltages are insufficient to actuate the contactor

but large enough to burn out the resistors. Normal

actuating voltages are quickly disconnected from the

coils and control module by the latch clearing contacts.

Coil and module failures are possible when used with

solid state relays and PLC outputs. 24-Volt systems

are ok to use, but 120 volts and above should be

discouraged. If higher voltages cannot be avoided, an

interposing relay should be used.

Failure to Pick-up and

Seal

Failure to Drop-Out

Low Voltage

Wrong Coil or

Wrong Connection

Mechanical Obstruction

Coil Open or Overheated

Sticky Substance on Pole

Faces

Release Coil not Energized

Worn or Rusted Parts Causing

Binding

Contacts Welded

Check system voltageand voltage dips during starting.

Check coil marking and wiring.

With power off, check for movement of armature and

contacts.

Replace.

Clean pole faces with LPS CFC-Free Electro Contact

Cleaner.

Check coil, coil circuit or length of leads from supply

voltage to coil. Coil may be open or lead length is

excessive.

Replace unit.

See ‘Welding’ under Contacts.

These instructions do not purport to cover all details or

variations in equipment nor to provide for possible con-

tingency to be met in connection with installation, op-

eration, or maintenance. Should further information be

desired, or should problems arise which are not cov-

ered sufciently for the purchaser’s purpose, the matter

should be referred to the local SIemens Industry, Inc.,

Sales Ofce.

The contents of this instruction sheet shall not become

part of or modify any prior or existing agreement, com-

mitment or relationship. The sales contract contains the

entire obligation of Siemens Industry, Inc. The warranty

contained in the contract between the parties is the sole

warranty of Siemens Industry, Inc. Any statements con-

tained herein do not create new warranties or modify the

existing warranty.

Magnetic and

Mechanical Parts

Contacts

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