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List of Device Numbers
& q, [- Y9 |0 _0 @* [Click to learn more...; p6 N8 k( Y1 j1 Z& q
7 ]- r- z" o& |/ C5 P * 1 - Master Element
3 Q/ q% l4 r4 }( C" U$ ^ * 2 - Time Delay Starting or Closing Relay
s U5 W$ x7 ?7 E3 ^' J' v6 m * 3 - Checking or Interlocking Relay
$ p3 o) k! Q$ M * 4 - Master Contactor9 q/ f- D% V8 i, f4 }1 O: x& P
* 5 - Stopping Device
4 k3 l6 D) _. a8 b5 M" P * 6 - Starting Circuit Breaker
# E0 t1 Z: G+ f n e * 7 - Anode Circuit Breaker
) W4 h; i$ \; B4 C4 H; V7 Z& ~1 [ * 8 - Control Power Disconnecting Device
4 {% w+ H1 ?4 d4 N! o4 H- I- l * 9 - Reversing Device! n4 K s, P4 z3 A; D, m+ P
* 10 - Unit Sequence Switch
" ]7 }; l7 j. G+ W * 12 - Overspeed Device
- r& f5 @( @, q% Q+ Y * 13 - Synchronous-speed Device; J1 C% H% V' d, q# [5 p
* 14 - Underspeed Device6 f, T: n9 h0 o9 N( ~* l1 e5 R" ^
* 15 - Speed - or Frequency-Matching Device
" G$ F* _: x& v" u2 e7 D * 21 - Distance Relay5 y( U+ k9 ?3 J" ?9 g7 e
* 23 - Temperature Control Device5 H, Y2 w- s0 Z6 G$ I
* 25 - Synchronizing or Synchronism-Check Device
! I2 A# Q8 v. M( R8 ~ * 26 - Apparatus Thermal Device
6 L" w! ]% ` ]( c * 27 - Undervoltage Relay
@+ j E1 i* z2 M/ W * 29 - Isolating Contactor
; s* {7 q, i' J4 D# K) b * 30 - Annunciator Relay7 J) [' u$ Y% B7 X, z* H% m7 S E" I
* 32 - Directional Power Relay t, ?; }& Z8 [2 {& J
* 36 - Polarity or Polarizing Voltage Devices
P7 ~; Y* ?9 l7 m R# ^ * 37 - Undercurrent or Underpower Relay8 _- h& X; K2 v T8 e
* 38 - Bearing Protective Device
1 `, | S5 ~- x! x7 M+ |& P! { * 39 - Mechanical Conduction Monitor
& w, y; [. Z4 P- \4 [& U * 40 - Field Relay8 l' M( A0 j0 T4 ^
* 41 - Field Circuit Breaker0 Y) ?8 u. [( \$ I3 f* @: `
* 42 - Running Circuit Breaker% q/ v" x1 J' q8 }- {
* 43 - Manual Transfer or Selector Device. W- t6 K2 ?$ F/ i. \% R3 [0 e/ C
* 46 - Reverse-phase or Phase-Balance Relay! u% ^' [& y) m
* 47 - Phase-Sequence Voltage Relay3 m1 |: {% n0 K- M( N
* 48 - Incomplete-Sequence Relay* M0 N1 ?7 c8 W. @
* 49 - Machine or Transformer Thermal Relay
5 i/ _, S# `" l, z" o* S * 50 - Instantaneous Overcurrent+ B8 t, _6 |& o M# f! j
* 51 - AC Time Overcurrent Relay
: v6 V9 r/ m% G9 F * 52 - AC Circuit Breaker* t5 c% N( O* y" c/ X
* 53 - Exciter or DC Generator Relay+ |, N# g2 R5 O0 o; v5 e$ W% f
* 54 - High-Speed DC Circuit Breaker
2 ?5 m* D1 C4 S Q; v; L) U4 W * 55 - Power Factor Relay1 ]) Y! d1 N# \; U
* 56 - Field Application Relay7 Q; P V8 ?6 I0 H# v8 i1 {8 x
* 59 - Overvoltage Relay
$ {/ m; L8 `+ S * 60 - Voltage or Current Balance Relay) x) F' Y) p) K6 {7 l, Z
* 61 - Machine Split Phase Current Balance4 b' l, k- y) m: M- b
* 62 - Time-Delay Stopping or Opening Relay9 q' c$ k% X" p4 M
* 63 - Pressure Switch
& `3 B1 @/ |& {7 r- r1 V * 64 - Ground Detector Relay
; b: _/ ~, }1 V" e1 i! W) d& R0 E * 65 - Governor3 G' B& u& m. Y; U- Q& }
* 66 - Starts per Hour
! i* `3 J/ J% B" d3 T7 a# z; H1 N * 67 - AC Directional Overcurrent Relay6 B' \" ^+ S6 ^7 |9 b, P
* 68 - Blocking Relay) [6 l. J; M6 A5 ]
* 69 - Permissive Control Device, b& u: I0 }. `& O( ?1 T- _0 P
* 71 - Level Switch
5 K9 X2 ^0 [0 _ * 72 - DC Circuit Breaker
' d3 G3 E/ G b, b * 74 - Alarm Relay
2 n3 X( W) Y8 V$ ?- C- Y2 @% k * 75 - Position Changing Mechanism( n1 v" B& e6 ^$ b+ |- B
* 76 - DC Overcurrent Relay: S$ O8 B- R* @6 Q
* 78 - Phase-Angle Measuring or Out-of-Step Protective Relay) O1 T- C' E! B* X( Z
* 79 - AC-Reclosing Relay1 z w6 @: d; l6 o
* 81 - Frequency Relay
" }" C% O( B' `: i6 A! Z * 83 - Automatic Selective Control or Transfer Relay" e+ P0 Q% Q5 c8 _; {- B/ l
* 84 - Operating Mechanism
( W, c1 [5 O: }) m( x' r5 | * 85 - Carrier or Pilot-Wire Receiver Relay# h$ U% z3 y0 r, Y2 T* b! [
* 86 - Lockout Relay7 w4 ]/ ]* ?- Q) Q
* 87 - Differential Protective Relay: ?& N# Z- z- [, P' ?
* 89 - Line Switch; M3 o$ i, I7 f' h& c* ~' {
* 90 - Regulating Device
, A/ J0 W" P4 J R * 91 - Voltage Directional Relay- J; |8 z( _% s: y
* 92 - Voltage and Power Directional Relay
* N6 h) w$ z) Z" z* N * 94 - Tripping or Trip-Free Relay7 j% W1 @, U3 g
* 95 - Reluctance Torque Synchrocheck
* G$ `7 H5 v" Y1 R) V( Z- i * 96 - Autoloading Relay |
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