Accessories
© 2014 Littelfuse Protection Relays & Controls
Current Transformers (CTs)
CT SELECTION GUIDE
*Phase CTs should be selected with a primary rating of 100-300% of rated current to maintain specified accuracy. CTs with a 1-A or 5-A secondary are accepted.
†Trip levels are model specific, see ordering information..
‡Select a CT with a primary rating approximately equal to the system’s rated current. CTs with 5-A secondary current are accepted.
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
SE-701/SE-703
CT-200 Series 10-198 A
EFCT Series 50 mA-4.95 A
SE-CS30 Series 300 mA-29.7 A
SE-704 SE-CS30 Series 10 mA-5 A
EL731 EFCT Series 30-5,000 mA AC and DC
SE-105/SE-107 CT200 Series 0.5-4 A
SE-134C/SE-135 SE-CS10 Series 0.5-12.5 A
SE-145 SE-CS10 Series 0.5-12.5 A
SE-CS40 Series 2.0-50 A
SE-330
CT200 Series 12-200 A
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 0.4-150 A
MPU-32*
CT200 Series 10-200 A
EFCT Series 50 mA-5 A
SE-CS30 Series 300 mA-30 A
MPS*
CT200 10-200 A
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†
FPU-32*
CT200 Series 10-200 A
EFCT Series 50 mA-5 A
SE-CS30 Series 300 mA-30 A
FPS*
CT200 10-200 A
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
GROUND FAULT
PROTECTION
TRAILING CABLE
PROTECTION
RESISTANCE
GROUNDING
MOTOR & PUMP
PROTECTION
FEEDER
PROTECTION
ARC-FLASH
PROTECTION
Rev: 4-B-061214
Accessories
© 2014 Littelfuse Protection Relays & Controls
Current Transformers
CURRENT TRANSFORMERS
CURRENT TRANSFORMERS
Product Features Inner Diameter Accessory For
CT200 (PGC-2056)
Current Transformer
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
Detects phase current or ground-fault
current. (200-A primary)
89 mm
(3.50")
SE-701 SE-105 MPU-32
SE-107 MPS FPU-32
AF1000 FPS
EFCT-26 (PGC-3026)
Ground-Fault Current
Transformer
Sensitive current transformer used to
detect ground-fault current. (5-A primary)
26 mm
(1.02")
SE-330 MPS MPU-32
SE-701 FPU-32 FPS
EL731
EFCT-1 (PGC-3082)
Ground-Fault Current
Transformer
Sensitive current transformer used to
detect ground-fault current. (5-A primary)
82 mm
(3.23")
SE-330 MPS MPU-32
SE-701 FPU-32 FPS
EL731
EFCT-2 (PGC-3140)
Ground-Fault Current
Transformer
Sensitive current transformer used to
detect ground-fault current. (5-A primary)
140 mm
(5.50")
SE-701
MPU-32
EL731
MPS
FPU-32
FPS
EFCT-1FC (PGC-31FC)
Flux Conditioner
Fits in the EFCT-1 window to reduce
saturation and prevent false operation
due to large surge currents.
70 mm
(2.75") EFCT-1
SE-CS10-2.5 (PGC-4064)
Current Sensor Detects ground-fault current. 64 mm
(2.50") SE-134C SE-135 SE-145
SE-CS10-4
(PGC-4108)
Current Sensor Detects ground-fault current. 108 mm
(4.25") SE-134C SE-135 SE-145
SE-CS10-6
(PGC-4160)
Current Sensor Detects ground-fault current. 160 mm
(6.31") SE-134C SE-135 SE-145
SE-CS10-8
(PGC-4210)
Current Sensor
Detects ground-fault current. 210 mm
(8.25") SE-134C SE-135 SE-145
SE-CS30-26 (PGC-5025)
Ground-Fault Current Transformer
Current Transformer for low-level
ground faults. (30-A primary)
26 mm
(1.02")
SE-704
SE-330
SE-701
PGR-6100
MPU-32
MPS
FPU-32
FPS
SE-CS30-70 (PGC-5060)
Ground-Fault Current Transformer
Current Transformer for low-level
ground faults, flux conditioner
is standard. (30-A primary)
70 mm
(2.76")
SE-704
SE-330
SE-701
PGR-6100
MPU-32
MPS
FPU-32
FPS
SE-CS30-4 (PGC-5095)
Ground-Fault Current Transformer
Current Transformer for low-level
ground faults, flux conditioner
is standard. (30-A primary)
95 mm
(3.74")
SE-704
SE-701
PGR-6100
MPU-32
MPS
FPU-32
FPS
SE-CS30-5 (PGC-5130)
Ground-Fault Current Transformer
Current Transformer for low-level
ground faults, flux conditioner
is standard. (30-A primary)
130 mm
(5.12")
SE-704
SE-701
PGR-6100
MPU-32
MPS
FPU-32
FPS
SE-CS30-8 (PGC-5200)
Ground-Fault Current Transformer
Current Transformer for low-level
ground faults, flux conditioner
is standard. (30-A primary)
200 mm
(7.87")
SE-704
SE-701
PGR-6100
MPU-32
MPS
FPU-32
FPS
SE-CS40-6
Current Sensor Detects ground-fault current
160 mm
(6.31”)
SE-135 SE-145
Rev: 4-B-061214
Accessories
© 2014 Littelfuse Protection Relays & Controls
NOTE: Contact factory for additional CT offerings.
Current Transformers
PGC FAMILY, PGG FAMILY
CURRENT TRANSFORMERS
Product Features Inner Diameter Accessory For
PGC-6035
Ground-Fault Current
Transformer
Current transformer for measuring
ground-fault current.
35 mm
(1.38") PGR-6150
PGC-6060
Ground-Fault Current
Transformer
Current transformer for measuring
ground-fault current.
60 mm
(2.36") PGR-6150
PGC-6080
Ground-Fault Current
Transformer
Current transformer for measuring
ground-fault current.
80 mm
(3.15") PGR-6150
PGC-6110
Ground-Fault Current
Transformer
Current transformer for measuring
ground-fault current.
110 mm
(4.33") PGR-6150
PGC-6210
Ground-Fault Current
Transformer
Current transformer for measuring
ground-fault current.
210 mm
(8.27") PGR-6150
Rev: 4-B-061214
