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List of Device Numbers
8 @* ]" g5 N& `3 J# ]# D( TClick to learn more...7 ] a- ]6 I0 _% ] k# E6 _
' {# S! J6 T' E1 c! q( C * 1 - Master Element
$ l2 }. {' T- x/ b * 2 - Time Delay Starting or Closing Relay/ ]; [6 C2 b- }0 B p7 I
* 3 - Checking or Interlocking Relay
2 L2 U: k$ Q0 F* a: Q% P * 4 - Master Contactor2 ]* R+ k2 l1 D
* 5 - Stopping Device
' v+ u0 @ ]; i * 6 - Starting Circuit Breaker
! h [- D0 e$ L0 {$ o3 v * 7 - Anode Circuit Breaker3 W* P9 g! Q x: x [
* 8 - Control Power Disconnecting Device3 V7 Q4 L# m* g& U
* 9 - Reversing Device, o5 M+ ]) p6 c0 a
* 10 - Unit Sequence Switch2 R6 O# v" ~* ^- N, g' j
* 12 - Overspeed Device' b2 U' {4 h2 Y
* 13 - Synchronous-speed Device
2 F, M7 D5 H$ D3 u7 |' o * 14 - Underspeed Device
$ L) R& I1 s+ y * 15 - Speed - or Frequency-Matching Device
$ G4 `3 j9 }6 R) t * 21 - Distance Relay
* {1 n; m7 [+ y. E4 l * 23 - Temperature Control Device+ P0 I1 A! p5 D
* 25 - Synchronizing or Synchronism-Check Device- R! ^: T( V) Q& ?# O
* 26 - Apparatus Thermal Device
1 ^* {1 F1 `! i * 27 - Undervoltage Relay
/ o# L7 g' ?9 _" o) q& i * 29 - Isolating Contactor( l! Y: B1 K7 O8 d/ `- \0 z0 V
* 30 - Annunciator Relay; u1 n* | T, g! H" a7 }
* 32 - Directional Power Relay, L$ w% ~+ e" L
* 36 - Polarity or Polarizing Voltage Devices
9 G+ f) ] w" S' F" |" _$ g# b3 A1 b * 37 - Undercurrent or Underpower Relay. Q T5 z/ a) ^- R" ^
* 38 - Bearing Protective Device
4 I; |0 `) ?( @0 t * 39 - Mechanical Conduction Monitor5 B2 A3 ^" {0 L! i2 w0 Q
* 40 - Field Relay0 T4 p0 X" N9 k4 ^8 b( }# [; }
* 41 - Field Circuit Breaker
( j" P% \5 r/ U, d8 @, X/ g * 42 - Running Circuit Breaker
8 Q; V7 t5 n3 {# u * 43 - Manual Transfer or Selector Device _1 z; i d( p
* 46 - Reverse-phase or Phase-Balance Relay
# p( u9 d j6 T# p! [1 T$ Z' Z * 47 - Phase-Sequence Voltage Relay- x$ e0 H2 }- I/ Y
* 48 - Incomplete-Sequence Relay
; a) q# _5 }/ O; t * 49 - Machine or Transformer Thermal Relay
2 J {3 a; @3 y7 n6 z) n' | * 50 - Instantaneous Overcurrent
% Q* x' V! p; @ * 51 - AC Time Overcurrent Relay% M7 c; g; O2 l6 d6 c- t: i. N
* 52 - AC Circuit Breaker: O% l3 f$ M5 B/ L- H, u" S' n
* 53 - Exciter or DC Generator Relay
5 H2 s0 z1 u- J6 b * 54 - High-Speed DC Circuit Breaker c+ ]) v% X- ]) W
* 55 - Power Factor Relay
- j8 X$ K% C! u1 R2 n% h# _% b7 u * 56 - Field Application Relay( a: B. B8 z9 r- @8 t# n
* 59 - Overvoltage Relay0 W$ v6 u( L2 ]. R0 X
* 60 - Voltage or Current Balance Relay5 }1 E2 ~& |& p0 Y
* 61 - Machine Split Phase Current Balance) Q, q1 C9 D: I3 M f7 l) l7 d
* 62 - Time-Delay Stopping or Opening Relay) ?( p( R+ x/ K3 z
* 63 - Pressure Switch
% S( R/ q8 c& l( D * 64 - Ground Detector Relay+ b- N/ P W& ]- j0 C- e4 s/ X
* 65 - Governor
" @5 p, d6 s4 y, C: |+ Q1 ` * 66 - Starts per Hour U$ X2 m5 O; V& i: ]$ I y
* 67 - AC Directional Overcurrent Relay
9 J- ~' a+ a; S9 K4 E * 68 - Blocking Relay5 r3 C2 d3 a; l- R9 J0 \) m
* 69 - Permissive Control Device8 y4 I) v' ^% D% B7 m
* 71 - Level Switch, F0 ^1 W1 J; o! [: a
* 72 - DC Circuit Breaker
5 \3 x3 |! C& @5 n( x- d * 74 - Alarm Relay9 x1 B) Q; p% J0 X* L* ^5 f
* 75 - Position Changing Mechanism9 I/ |4 ^$ w5 z: P; z* ?! B
* 76 - DC Overcurrent Relay
1 _$ u8 M, U R3 p( S+ P * 78 - Phase-Angle Measuring or Out-of-Step Protective Relay
) ?( p) h6 ?# G7 J, x* ^0 S * 79 - AC-Reclosing Relay8 y7 \5 `. c% v+ l! p: X
* 81 - Frequency Relay
5 ~1 v* @" Q, ]% @- W. z * 83 - Automatic Selective Control or Transfer Relay/ ^5 m% E5 [( r# y& N
* 84 - Operating Mechanism/ @ t, V" x" L' C# K
* 85 - Carrier or Pilot-Wire Receiver Relay) _$ J F6 S2 F0 @3 X+ H3 t
* 86 - Lockout Relay$ L# H* R) Q( y
* 87 - Differential Protective Relay
4 T$ M3 S$ u0 Z- G/ u * 89 - Line Switch
; r) L! K! T4 O% s9 i0 G+ I * 90 - Regulating Device. N2 j5 j- l v3 J- s
* 91 - Voltage Directional Relay
: B% c. J/ K9 M# _% X5 g * 92 - Voltage and Power Directional Relay* V' L$ @/ D" |, l+ [% I6 b$ P
* 94 - Tripping or Trip-Free Relay! H. l6 j1 Z' Z7 y, c
* 95 - Reluctance Torque Synchrocheck
$ {$ e. C A0 i( ?2 a1 t) L3 Q * 96 - Autoloading Relay |
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