Relay Device Number Definitions
and Vendor Cross-Reference

Device
Number

Function

ITE

GE

West.

25

Synchronism Check ITE-25S
ITE-25V
IJS-51
IJS-52D
CVE
CVE-1

27

Undervoltage

Inverse Time Delay ITE-27 IAV CV

Instantaneous w/Timer ITE-27D - -

Instantaneous ITE-27H NGV SV, SVF

27/59

Under and Overvoltage

Inverse Time Delay ITE-27/59 IAV CV

Instantaneous w/Timer ITE-27/59D - -

Instantaneous ITE-27/59H CFV, NGV SV, SVF-1

32

Phase Directional ITE-32 CAP, CCP H-3

Reverse Power ITE-32R ICW CRN-1

Over/Under Power ITE-32W CFW CW

32N

Ground Directional

Dual Polarized ITE-32D CFPP -

Negative Sequence Polarized ITE-32Q - -

40

Loss of Excitation - CEH KLF

46

Current Balance ITE-46D IJC CM

Negative Sequence Time OC ITE-46Q INC, SGC COQ

Negative Seq. OC, High Speed ITE-46H - POQ

47

UV and Phase Sequence
Inverse Time Delay ITE-47 ICR CP, CVQ
High Speed ITE-47H CFV -
Instantaneous w/Timer ITE-47D - -

49

Thermal Overcurrent ITE-49 TMC BL-1
Temperature ITE-49T IRT DT-3

49/50/51

Motor Protection
Overload,Locked Rotor & Inst. ITE-49 - -

50

Instantaneous Overcurrent ITE-50 PJC SC, ITH
Inverse Instantaneous OC ITE-50I - -
High Dropout Inst. OC ITE-50H - KO-3
High Dropout Inst. OC w/Timer ITE-50D - -

50/51

Time Overcurrent

51

Inverse ITE-51I IAC-51 CO-7

50/51N

Very Inverse ITE-51Y IAC-53 CO-9

51N

Extremely Inverse ITE-51E IAC-77 CO-11
Short Time ITE-51S IAC-55 CO-2
Definite Time ITE-51D - CO-6
Fast Curve ITE-51SP - -
Long Time, Inverse ITE-51IM IAC-66A,B CO-5
Long Time, Inverse w/Overload Alarm ITE51+50D IAC-66K COM-5
Long Time, Inverse w/Timer (Inrush) ITE-51 IAC-66M COM-5w/t
Long Time, Very Inverse ITE-51YM - -
Long Time, Extremely Inverse ITE-51L - -
Distribution Circuits ITE-51+50 IAC-66T CO-4

51V

Voltage Controlled Time Overcurrent ITE-47H&51 IGCV COV
Voltage Restrained Time Overcurrent - IJCV -

52

55

Power Factor - - -

59

Overvoltage
Inverse Time Delay ITE-59 IAV CV
Instantaneous w/Timer ITe-59D - -
Instantaneous ITE-59H NGV, PJV SV, SVF
Ground (Low Pickup) ITE-59G IAV51D, K CV-8

60

Voltage Balance
Voltage Balance, 2 Circuits ITE-60 CFVB -
Phase Unbalance w/Timer ITE-60Q NBV+SAM -

62

Timing Relay
Delay on Pickup ITE-62K SAM, RPM TK, TD
Delay on Dropout ITE-62K - -

67

Directional Time Overcurrent
Phase Protection ITE-32&51 IBC, JBC IRV, CR
Ground, Dual Polarized ITE-32D&51 IBCG, JBCC IRD, CRD
Ground, Neg. Seq. Polarized ITE-32Q&51 - IRQ, CRQ

67

Directional Instantaneous
Phase Protection ITE-32&50 CJC KRV
Ground, Dual Polarized ITE-32D&50 CJCG KRD
Ground, Neg. Seq. Polarized ITE-32Q&50 CNP KRQ

76

DC Overcurrent
Instantaneous (High Speed) ITE-76H RBP, RBC D-3,S
DC relay (Inst., Time Delay, or Rate of Rise) ITE-76T - -

79

Reclosing
Multi-Shot ITE-79M ACR, NLR RC, DRC
Single-Shot ITE-79S NSR, HGA SGR

81

Underfrequency ITE-81 SFF, CFF CF-1

87

Percentage Differential ITE-87M CFD SA-1

87B

Bus Differential (High Impedance) ITE-87B PVD, SBD KAB

87T

Transformer Differential ITE-87T BDD, STD HU, HU-1