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List of Device Numbers
9 M9 \4 y# b3 V1 F \Click to learn more...* P8 q! @, ~5 v% W q) F
8 K; b8 i# B( R* O" q" [ * 1 - Master Element
4 T+ \ w; P- G' P * 2 - Time Delay Starting or Closing Relay* {( {/ L U) }! M3 F$ _
* 3 - Checking or Interlocking Relay
' U8 `: A6 C! R1 [% {; k8 z' f. e: \2 M * 4 - Master Contactor5 Z/ d H, v3 ]- Y' d! w" a1 f
* 5 - Stopping Device
% u3 j4 A/ V( B* G0 R * 6 - Starting Circuit Breaker
8 q7 e, Z7 k7 q1 p4 g * 7 - Anode Circuit Breaker3 \& q- @7 G! [
* 8 - Control Power Disconnecting Device; g& X$ A5 E5 y/ I( @
* 9 - Reversing Device8 j( f1 B; a# d* [( X
* 10 - Unit Sequence Switch/ m2 C G5 k9 m. @5 V
* 12 - Overspeed Device
# J" s6 ^; V4 W5 d9 X& ~5 y+ ~ * 13 - Synchronous-speed Device; }# \8 L. O% V, J3 |: D9 t/ ]
* 14 - Underspeed Device# F b5 v" Y' i5 Y7 O- C# ?
* 15 - Speed - or Frequency-Matching Device
. ^( o+ E! z) t3 X. L. ` * 21 - Distance Relay" k# d( n$ x; j# P5 Q/ }1 e
* 23 - Temperature Control Device: W% ~0 w) v# h. `" S7 ^7 w
* 25 - Synchronizing or Synchronism-Check Device
9 U; B; z. L; R- f * 26 - Apparatus Thermal Device8 M" F2 p, O# R+ W. l2 W
* 27 - Undervoltage Relay
# x0 l* m- {; A* a3 M; \: g * 29 - Isolating Contactor K) V' ~4 t5 \% C0 r
* 30 - Annunciator Relay. C$ C/ ~) q: o
* 32 - Directional Power Relay$ {+ Z, H5 q7 k: Q0 D9 H
* 36 - Polarity or Polarizing Voltage Devices k# d& `, G# P+ J7 l
* 37 - Undercurrent or Underpower Relay
: W. L7 e# H+ P9 B5 M; [) D! ` * 38 - Bearing Protective Device$ {8 \: C: M+ y) R. X4 [- n* ]
* 39 - Mechanical Conduction Monitor2 m( C$ R% S5 d2 J: W8 V
* 40 - Field Relay
% O4 Y- N' V: @0 j1 l * 41 - Field Circuit Breaker% R5 V* S- ]+ \% E J j# C
* 42 - Running Circuit Breaker
5 V5 @ H! U+ A+ ?' x' j6 T' { * 43 - Manual Transfer or Selector Device- o2 a8 U7 Y1 y1 S
* 46 - Reverse-phase or Phase-Balance Relay6 ^; e W# t+ D* `3 [1 B
* 47 - Phase-Sequence Voltage Relay2 u2 y; t7 D0 k8 l6 T0 r
* 48 - Incomplete-Sequence Relay
1 }, T* y) E+ O' J& ` * 49 - Machine or Transformer Thermal Relay; C: l+ d7 X# i2 H x
* 50 - Instantaneous Overcurrent
3 c" o6 j2 p1 M9 T * 51 - AC Time Overcurrent Relay
3 c" M5 @- U* l. I3 _0 V- w * 52 - AC Circuit Breaker9 P- u+ I8 t! [5 Z; T% c+ q/ X
* 53 - Exciter or DC Generator Relay; A# U" n4 ?+ ~9 z/ K" t5 b
* 54 - High-Speed DC Circuit Breaker
( z W/ \) G1 R * 55 - Power Factor Relay. ~1 y. W! ~3 e- A5 p" [0 _
* 56 - Field Application Relay( i4 y( k: i* J1 p) c
* 59 - Overvoltage Relay
5 {% X9 i2 o( _% D8 w9 M. G1 ^4 [ * 60 - Voltage or Current Balance Relay8 c( E4 g% c& d/ J1 F
* 61 - Machine Split Phase Current Balance
; S# _7 m+ y- ~ [7 L * 62 - Time-Delay Stopping or Opening Relay: L- W( k! W% n1 M# o% S
* 63 - Pressure Switch
* c- I5 u6 H6 i3 [" H I7 V, h * 64 - Ground Detector Relay
G5 J s! t& _7 Q, v. h6 e * 65 - Governor9 o# q/ b' B4 u# ~) C: A: p1 R
* 66 - Starts per Hour: M; c1 i4 K1 g, j+ G
* 67 - AC Directional Overcurrent Relay4 |& H* \, L+ p5 L0 A8 i* W
* 68 - Blocking Relay2 X; W: Y, Q! ~* U
* 69 - Permissive Control Device$ {% h& S# A# R# C
* 71 - Level Switch
' [) H: }0 ]5 S; \; M4 E; \7 H * 72 - DC Circuit Breaker
4 b; b3 _4 I p * 74 - Alarm Relay
, X# u6 M7 W4 f8 l- { * 75 - Position Changing Mechanism
( o# P. S: n5 y * 76 - DC Overcurrent Relay
, F1 O1 Z! _- X. s$ T * 78 - Phase-Angle Measuring or Out-of-Step Protective Relay
1 t1 p7 w* t- X) ]! Y8 J& h * 79 - AC-Reclosing Relay- a& C4 C( b) \$ t2 `0 O
* 81 - Frequency Relay
9 f1 w1 T4 \" f, p* R * 83 - Automatic Selective Control or Transfer Relay# v1 G' B* U( {4 j( I$ \
* 84 - Operating Mechanism5 M2 T6 t" t% I
* 85 - Carrier or Pilot-Wire Receiver Relay. k& x0 t$ j- z! K+ G. U) u: D
* 86 - Lockout Relay
8 A' }/ I) L5 [ * 87 - Differential Protective Relay
, m( f% S$ [) t8 S: R * 89 - Line Switch R0 g( s/ |( m2 k
* 90 - Regulating Device
4 H( p+ l+ W j1 n * 91 - Voltage Directional Relay! V. }2 G7 X8 }+ i3 a6 D, P
* 92 - Voltage and Power Directional Relay
" z: V, q! v5 B# @# F * 94 - Tripping or Trip-Free Relay
( O, E+ F! ?; ~9 | c2 }6 F' c3 b * 95 - Reluctance Torque Synchrocheck
* C0 u% F; w' G+ w * 96 - Autoloading Relay |
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