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List of Device Numbers
l+ `: y. i( I8 f: fClick to learn more...1 x% k3 @7 \# ?8 b
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* 1 - Master Element( v( {( j( t% g) x
* 2 - Time Delay Starting or Closing Relay
0 ^0 v: o4 @' u. B* y R/ x3 h * 3 - Checking or Interlocking Relay
' Z$ o! H, L3 P * 4 - Master Contactor* h2 G& Z& g0 b2 A& S- d2 z+ [
* 5 - Stopping Device
( b/ k2 |: ~: s4 Y * 6 - Starting Circuit Breaker
0 {) H- [% |3 V% d$ K * 7 - Anode Circuit Breaker
. \1 Y4 ?/ ]: _9 x * 8 - Control Power Disconnecting Device
- a+ d9 l4 Q0 W. J0 L * 9 - Reversing Device
! o! Q L: O" I- R+ |& F: T# Q * 10 - Unit Sequence Switch
0 i* [/ [8 B4 M3 s& _5 l+ n z$ r' K * 12 - Overspeed Device9 g* x9 S* N, N/ c a8 N: A
* 13 - Synchronous-speed Device
7 \3 Y7 v4 [% Y * 14 - Underspeed Device
0 k8 u# i2 N3 n2 x1 H. ]: n: G; H. P5 b * 15 - Speed - or Frequency-Matching Device
. ~- X" N' w0 C( T' W. W$ z * 21 - Distance Relay
" `* e$ v$ q- @. V# g * 23 - Temperature Control Device
$ S# u# _' H9 d" I9 J* I3 ? * 25 - Synchronizing or Synchronism-Check Device4 }5 D/ D: _! S9 F6 v9 x: g
* 26 - Apparatus Thermal Device
3 p( {+ U' R! ^7 G: ] * 27 - Undervoltage Relay
# a+ ?* \% o# I * 29 - Isolating Contactor! B+ a3 @5 ~# J" B( `3 R1 d2 i
* 30 - Annunciator Relay% k2 G0 O) J% [
* 32 - Directional Power Relay
3 X4 j4 \2 Z- t, |9 Q" I" p * 36 - Polarity or Polarizing Voltage Devices
- w5 m# H6 k' z+ j * 37 - Undercurrent or Underpower Relay
) H/ H7 E/ h$ X * 38 - Bearing Protective Device
$ w% ]/ z0 ^# ]6 s. n5 S4 V$ g, S * 39 - Mechanical Conduction Monitor
0 e: g& `: F' h- W2 C * 40 - Field Relay: q3 A5 \( ]1 z2 F, k. P: H
* 41 - Field Circuit Breaker$ H+ h: L2 e" S6 E
* 42 - Running Circuit Breaker( {' c/ c d4 _9 ^; n$ g) q3 p
* 43 - Manual Transfer or Selector Device
5 {5 k' ?( o2 a5 e9 l' }( p * 46 - Reverse-phase or Phase-Balance Relay
6 h# a5 P5 X9 N9 Z+ Q& a( r& q/ e * 47 - Phase-Sequence Voltage Relay
! h2 ]! h% w. [- Z, }( R1 |5 \ * 48 - Incomplete-Sequence Relay
( n- {4 J* d P * 49 - Machine or Transformer Thermal Relay6 c- B% c3 x$ M5 ]; J
* 50 - Instantaneous Overcurrent
+ F/ O _0 Y- M A- `3 w- T * 51 - AC Time Overcurrent Relay# y0 X p# y/ D
* 52 - AC Circuit Breaker
' P, K; T1 a8 | * 53 - Exciter or DC Generator Relay8 ^0 Q0 w* O- Y) \* {1 j
* 54 - High-Speed DC Circuit Breaker: l- A7 @/ |) r$ K
* 55 - Power Factor Relay2 V3 X, C8 V* L
* 56 - Field Application Relay
3 V5 I. [% O1 q * 59 - Overvoltage Relay/ b% P' u& \& ^
* 60 - Voltage or Current Balance Relay/ [4 l9 N, _; b1 q: _2 H9 c
* 61 - Machine Split Phase Current Balance
. B9 }+ M4 N B' C# B * 62 - Time-Delay Stopping or Opening Relay5 ^9 n; C1 o8 P7 [
* 63 - Pressure Switch& y" {' R% R' k6 Y+ C' X) c2 Z" @
* 64 - Ground Detector Relay
2 W& P& i- ^4 {" w* g* ^ * 65 - Governor
: C0 e0 j. [0 O( `* x * 66 - Starts per Hour3 D5 \2 z0 W, C$ |: E! ]% W3 F2 o
* 67 - AC Directional Overcurrent Relay
5 U! F, n' v& P * 68 - Blocking Relay
3 Q5 K; @ l/ }7 F * 69 - Permissive Control Device# ^' L- U$ }/ n# f
* 71 - Level Switch
* V* u' v" _ \) k7 C. T/ S, V * 72 - DC Circuit Breaker; \- J( h8 X7 s# M9 Z. G" @
* 74 - Alarm Relay$ x y# `2 h9 b; N2 N
* 75 - Position Changing Mechanism
4 _; h! o' }* v# n, y * 76 - DC Overcurrent Relay
2 H5 w$ {4 J" W5 Y; V * 78 - Phase-Angle Measuring or Out-of-Step Protective Relay
9 `, s. [, M/ w t * 79 - AC-Reclosing Relay
9 |! b, v O3 I8 V5 o * 81 - Frequency Relay
: P4 R/ `: w( y& p * 83 - Automatic Selective Control or Transfer Relay, t4 j; E) m5 H
* 84 - Operating Mechanism
3 |% a/ f( \# I/ H m, K * 85 - Carrier or Pilot-Wire Receiver Relay
( q- ]6 m- V X0 A$ i* U. H5 m * 86 - Lockout Relay
8 T+ q7 K4 j0 C) H! O * 87 - Differential Protective Relay
% o9 b6 g' [/ @" l6 G8 ? * 89 - Line Switch) y2 D. L" M: \/ s( Z9 ~: z
* 90 - Regulating Device
/ C% U" Z# K2 t * 91 - Voltage Directional Relay
* ]8 [# g. n+ L5 I: ~ * 92 - Voltage and Power Directional Relay
, O8 \0 H% i9 R! B: T) c h1 R- _ * 94 - Tripping or Trip-Free Relay
$ i- @* W- t8 `; Q * 95 - Reluctance Torque Synchrocheck7 t8 i6 O3 A) @' ^* m
* 96 - Autoloading Relay |
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