Siemens CLM0C Assembly instructions

Installation Sheet
January, 2016
Supersedes February, 2013
s
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.
30
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
1A
28VA
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
40
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
6
Coil Wire Connector (2)
8-9
12
Stationary Contact Screw (2/pole)
8-9 10
Main Power Connector (2/pole)
18-20
13
Fig. 1
CAUTION: Avoid attempting to manually latch or delatch the contactor.
6
12
13
10
11
5
8
9
1 2 3 4
7
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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.
Hz
Part Number
2-4 Pole 5 Pole
24
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
OFF ON
VOLTAGE
CONTROL
(L1)
1
(L2)
X2
ON OFF
( + )
( - )
BLACK( + )
( - )
ACAC
L2
RED
WHITE
CLMFCCK11
3
2
RED
CLMFCAK11
OFF
ON
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
L2
RED
WHITE
CLMFCCK11
3
2
RED
CLMFCAK11
OFF
ON
RED
CR
REMOTE DEVICE
CR CR
CLM CONTACTOR
VOLTAGE
CONTROL
ON OFF
( + )
( - )
BLACK ( + )
( - )
ACAC
L2
RED
WHITE
CLMFCCK11
3
2
RED
ON
OFF
RED
CR
REMOTE
CR CR
(L1)
1
(L2)
X2
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
1
50A14,000A
18,000A
600V
22,000A
480V
25,000A
30,000A
480V
Thermal/Mag.
Type CB
1
50A
25,000A
25,000A
600V
65,000A
65,000A
480V
100,000A
100,000A
480V
65,000A
50,000A
600V
Thermal/Mag.
Type CB
2
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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