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List of Device Numbers
7 a; q k0 Z& w5 G5 AClick to learn more...
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8 V# Q( N, F+ z8 |" |4 W * 1 - Master Element
; f3 c9 r) U7 _' E2 W- N; X * 2 - Time Delay Starting or Closing Relay8 D4 i. o w- n2 y$ n
* 3 - Checking or Interlocking Relay
1 a' T6 H, _5 g4 x9 ?, W- C * 4 - Master Contactor) o5 [# D6 s9 J: Y; N& B
* 5 - Stopping Device1 o, |+ J' f* H
* 6 - Starting Circuit Breaker z& a' N. A& P3 I
* 7 - Anode Circuit Breaker% F- a1 a1 `9 w+ ^2 j, r6 d
* 8 - Control Power Disconnecting Device5 C! V- F- [# R3 b$ `& m) O) }2 p
* 9 - Reversing Device) \+ `3 Q, s* N3 s1 j1 ?
* 10 - Unit Sequence Switch
$ W/ N+ y/ J' b8 U * 12 - Overspeed Device
2 N, U1 I7 G% i" b * 13 - Synchronous-speed Device
0 q) v5 Z( b. z1 |+ l. _- @ * 14 - Underspeed Device$ H2 ^4 d( f) d1 C6 U4 z# E/ U
* 15 - Speed - or Frequency-Matching Device
8 F: P/ Q: ~3 e) J4 t; y* b' G9 |5 c * 21 - Distance Relay
! K9 B) L% {& D* l * 23 - Temperature Control Device
% z6 V+ v3 H: O3 U * 25 - Synchronizing or Synchronism-Check Device5 p9 r6 Y& L" ~" H, |) g) U# U
* 26 - Apparatus Thermal Device
* X+ t1 m% F' C, S' I * 27 - Undervoltage Relay0 V8 y0 c/ t8 V4 C. @3 q
* 29 - Isolating Contactor
\9 V3 s& d6 j- }- W+ |( I7 I' J1 N * 30 - Annunciator Relay2 L5 i, h4 v" l x2 d, c7 Z
* 32 - Directional Power Relay
3 Q& `% X! T1 b1 O * 36 - Polarity or Polarizing Voltage Devices
+ d2 x) s/ |2 } `- w * 37 - Undercurrent or Underpower Relay
( I) `, }$ z0 E/ _% J& @3 Q * 38 - Bearing Protective Device
* ]0 v x; `# P8 | * 39 - Mechanical Conduction Monitor
( h2 x& u9 E3 r3 E. A4 k+ X * 40 - Field Relay4 E8 H0 C/ r# O" e' M8 ^9 b! G0 `
* 41 - Field Circuit Breaker
; Q+ R1 A; T8 d# Q5 s4 r7 Z* r/ ^ * 42 - Running Circuit Breaker
1 e! U$ |( P3 |( [# b * 43 - Manual Transfer or Selector Device) X" \( j3 O0 Q7 V" ]
* 46 - Reverse-phase or Phase-Balance Relay) y1 J8 `" h1 y" _
* 47 - Phase-Sequence Voltage Relay
O2 v: [! |1 ?4 \% l0 H. a$ S * 48 - Incomplete-Sequence Relay
$ S/ S7 b( F N5 T' i, m * 49 - Machine or Transformer Thermal Relay3 b+ m3 C- Q8 w9 i/ H' M
* 50 - Instantaneous Overcurrent
$ x8 v- S9 u; N) u5 N * 51 - AC Time Overcurrent Relay1 l1 I: J( W; V6 B
* 52 - AC Circuit Breaker
8 ^' c% S0 n6 {+ m * 53 - Exciter or DC Generator Relay2 L$ _2 F! A0 G4 g) E! Q* m0 L
* 54 - High-Speed DC Circuit Breaker5 r+ ? u( r% f/ v) X
* 55 - Power Factor Relay: O! G: u: O$ y& D! s( \
* 56 - Field Application Relay
, Q- A+ Q% h4 A J+ j * 59 - Overvoltage Relay- b1 j' i$ Y' G' ]
* 60 - Voltage or Current Balance Relay9 b( X P* G9 v1 l
* 61 - Machine Split Phase Current Balance
: j! v! {* ~4 m4 G' X * 62 - Time-Delay Stopping or Opening Relay: f! g' _: y: G+ a9 M+ U1 o
* 63 - Pressure Switch0 e; F. w& O& A6 r7 y
* 64 - Ground Detector Relay
7 V. v+ [5 `/ T1 Z * 65 - Governor
- Z' K4 n- m9 c1 Z * 66 - Starts per Hour3 X, H0 _' p: V. g
* 67 - AC Directional Overcurrent Relay
- f8 z7 g2 P) T# ^: n/ K. i, O; N * 68 - Blocking Relay
- H( v C/ k# T. a' t, c * 69 - Permissive Control Device
* |% X, O" w3 ^( g) k0 H9 o * 71 - Level Switch1 x4 f) J3 f2 u8 `! ]+ P2 o# O5 h
* 72 - DC Circuit Breaker5 q- P$ W5 c4 ^% O# `# p9 G/ c
* 74 - Alarm Relay
2 s6 S( H1 ]/ i$ S) ? * 75 - Position Changing Mechanism4 {& J' H0 o9 c0 f
* 76 - DC Overcurrent Relay
; ]7 s) Z: U' v: g3 Q J7 u * 78 - Phase-Angle Measuring or Out-of-Step Protective Relay7 p9 J6 Q' n+ T- d7 l/ p3 z
* 79 - AC-Reclosing Relay8 l: ~) f' ~% o; b8 r
* 81 - Frequency Relay# x3 K+ V+ T0 ~8 P% K. W2 L5 S
* 83 - Automatic Selective Control or Transfer Relay
# D7 [; Q! V9 H9 S5 m: [, o' u# u * 84 - Operating Mechanism
" _3 P6 O- d$ s! [ s0 ?+ U * 85 - Carrier or Pilot-Wire Receiver Relay
! e; ~6 {/ z9 |& I6 K * 86 - Lockout Relay
% }& K. t' u5 [6 G e0 F- h \ * 87 - Differential Protective Relay
! x! c/ g+ a- f* L. | * 89 - Line Switch- o: `& N; D9 x. p# I; z7 b+ y
* 90 - Regulating Device
+ L+ L& Q& T- a: O% J8 n * 91 - Voltage Directional Relay+ M. J4 w7 J5 U' ^
* 92 - Voltage and Power Directional Relay
% }( m* c4 b& e * 94 - Tripping or Trip-Free Relay# d- y/ J8 v& X c
* 95 - Reluctance Torque Synchrocheck7 w' W) D/ ?* {/ w
* 96 - Autoloading Relay |
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