Littelfuse CT SelecTiOn User Manual
Accessories
Current Transformers (CTs)
CT SELECTION GUIDE
PROTECTION
GROUND FAULT
PROTECTION
TRAILING CABLE
RESISTANCE
GROUNDING
PROTECTION
MOTOR & PUMP
FEEDER
PROTECTION
ARC-FLASH
PROTECTION
PRODUCT GROUND-FAULT CT
GROUND-FAULT TRIP LEVEL
(or insulation level)
SE-601 No CTs required 1-20 mA
PGR-3100 No CTs required Indication only
PGR-3200 No CTs required
Warnings at 30 kΩ & 50 kΩ,
Alarm at 10 kΩ
SE-502 No CTs required 5 ± 0.9 mA
CT-20 0 Series 10-198 A
SE-701/SE-703
EFCT Series 50 mA-4.95 A
SE-CS30 Series 300 mA-29.7 A
SE-70 4 SE-CS30 Series 10 mA-5 A
EL731 EFCT Series 30-5,000 mA AC and DC
SE -10 5/SE -10 7 CT200 Series 0.5-4 A
SE -13 4 C/SE -13 5 SE-CS10 Series 0.5-12.5 A
SE -14 5
SE-CS10 Series 0.5-12.5 A
SE-CS40 Series 2.0-50 A
CT200 Series 12-200 A
SE-330
EFCT Series 100 mA-5 A
SE-CS30 Series 600 mA-30 A
SE-325 CT200 Series 0.5-4 A
PGR- 6150
No phase CTs required <25 A,
Optional SE-CS30 Series Ground-Fault CT
0.4-15 0 A
CT200 Series 10-200 A
MPU-32*
EFCT Series 50 mA-5 A
SE-CS30 Series 300 mA-30 A
CT200 10-200 A
MPS*
EFCT Series (5-A Primary) 50 mA-5 A
SE-CS30 Series (30-A Primary) 300 mA-30 A
MPU-32-X69X-PMA16 Existing CTs can be used or same as MPU-32.
MPS-469X-PMA24 Existing CTs can be used or same as MPS.
PGR-6800 No CTs required <91 A
N/A
†
CT200 Series 10-200 A
FPU-32*
EFCT Series 50 mA-5 A
SE-CS30 Series 300 mA-30 A
CT200 10-200 A
FPS*
EFCT Series (5-A Primary) 50 mA-5 A
SE-CS30 Series (30-A Primary) 300 mA-30 A
AF1000
‡
CTs are optional N/A
*Phase CTs should be selected with a primary rating of 100-300% of rated cur rent to maintain specified ac curacy. CTs with a 1-A or 5-A secondary are acc epted.
†Trip levels ar e model specific, see ordering infor mation..
‡Select a CT with a primary rating approximately equal to the system’s rated current. CTs with 5-A secondary current are accepted.
© May 2012 Littelfuse Protection Relays & Controls www.littelfuse.com/relayct
Accessories
Current Transformers
CURRENT TRANSFORMERS
Product Features Inner Diameter Accessory For
CT200 (PGC-2056)
Current Transformer
CURRENT TRANSFORMERS
Detects phase current or ground-fault
current. (200-A primary)
56 mm
(2.20")
SE-330 SE-105/107 FPS
SE-701 MPU-32 FPU-32
MPS SE-325 AF1000
CT200L (PGC-2089)
Current Transformer
EFCT-26 (PGC-3026)
Ground-Fault Current
Transformer
EFCT-1 (PGC-3082)
Ground-Fault Current
Transformer
EFCT-2 (PGC-3140)
Ground-Fault Current
Transformer
EFCT-1FC (PGC-31FC)
Flux Conditioner
SE-CS10-2.5 (PGC-4064)
Current Sensor
SE-CS10-4
Current Sensor
SE-CS10-6
Current Sensor
(PGC-4108)
(PGC-4160)
Detects phase current or ground-fault
current. (200-A primary)
Sensitive current transformer used to
detect ground-fault current. (5-A primary)
Sensitive current transformer used to
detect ground-fault current. (5-A primary)
Sensitive current transformer used to
detect ground-fault current. (5-A primary)
Fits in the EFCT-1 window to reduce
saturation and prevent false operation
due to large surge currents.
Detects ground-fault current.
Detects ground-fault current.
Detects ground-fault current.
89 mm
(3.50")
26 mm
(1.02")
82 mm
(3.23")
140 mm
(5.50")
70 mm
(2.75")
64 mm
(2.50")
108 mm
(4.25")
160 mm
(6.31")
SE-701 SE-105 MPU-32
SE-107 MPS FPU-32
AF1000 FPS
SE-330 MPS MPU-32
SE-701 FPU-32 FPS
EL731
SE-330 MPS MPU-32
SE-701 FPU-32 FPS
EL731
SE-701
MPU-32
EL731
EFCT-1
SE-134C SE-135 SE-145
SE-134C SE-135 SE-145
SE-134C SE-135 SE-145
MPS
FPU-32
FPS
SE-CS10-8
Current Sensor
(PGC-4210)
SE-CS30-26 (PGC-5025)
Ground-Fault Current Transformer
SE-CS30-70 (PGC-5060)
Ground-Fault Current Transformer
SE-CS30-4 (PGC-5095)
Ground-Fault Current Transformer
SE-CS30-5 (PGC-5130)
Ground-Fault Current Transformer
SE-CS30-8 (PGC-5200)
Ground-Fault Current Transformer
SE-CS40-6
Current Sensor
Detects ground-fault current.
Current Transformer for low-level
ground faults, flux conditioner
is standard. (30-A primary)
Current Transformer for low-level
ground faults, flux conditioner
is standard. (30-A primary)
Current Transformer for low-level
ground faults, flux conditioner
is standard. (30-A primary)
Current Transformer for low-level
ground faults, flux conditioner
is standard. (30-A primary)
Current Transformer for low-level
ground faults, flux conditioner
is standard. (30-A primary)
Detects ground-fault current
210 mm
(8.25")
25 mm
(0.98")
60 mm
(2.36")
95 mm
(3.74")
130 mm
(5.12")
200 mm
(7.87")
160 mm
(6.31”)
© May 2012 Littelfuse Protection Relays & Controls www.littelfuse.com/relayct
SE-134C SE-135 SE-145
SE-704
SE-330
SE-701
PGR-6100
SE-704
SE-330
SE-701
PGR-6100
SE-704
SE-701
PGR-6100
SE-704
SE-701
PGR-6100
SE-704
SE-701
PGR-6100
SE-135 SE-145
MPU-32
MPS
FPU-32
FPS
MPU-32
MPS
FPU-32
FPS
MPU-32
MPS
FPU-32
FPS
MPU-32
MPS
FPU-32
FPS
MPU-32
MPS
FPU-32
FPS
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