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List of Device Numbers
$ ?( H2 | G& ^. Y' RClick to learn more...$ C& _2 H1 X# a* I! u% C
: L8 L. R# h! [' u+ u, x * 1 - Master Element
( j% Z( k8 f6 W * 2 - Time Delay Starting or Closing Relay( j: G# S$ y1 l8 c' `
* 3 - Checking or Interlocking Relay4 m/ {. }; c# Y7 B# }; h- z
* 4 - Master Contactor
h( F9 Z4 F0 o0 @! P$ G * 5 - Stopping Device7 K' z9 R- \& l8 A D, @8 I" _
* 6 - Starting Circuit Breaker+ b, ~' d% p5 t8 O1 L+ S
* 7 - Anode Circuit Breaker4 E8 w+ U6 x) X! E
* 8 - Control Power Disconnecting Device
: ^; Y! N, S; p * 9 - Reversing Device; `1 x7 Q( s" u0 n
* 10 - Unit Sequence Switch
7 {, D6 n- L! M' j2 _/ t( f2 `- t * 12 - Overspeed Device
6 ]3 _. d8 J; q9 I) J! x% ~& E5 T * 13 - Synchronous-speed Device
. u6 f& F2 M# @' S7 l * 14 - Underspeed Device
" t# [3 C% D9 V * 15 - Speed - or Frequency-Matching Device1 K; k( x% O# T, {* E* c O, q9 B% d
* 21 - Distance Relay7 L2 h# b3 j V% [9 x( S
* 23 - Temperature Control Device p6 s& z K3 N& h, B8 d
* 25 - Synchronizing or Synchronism-Check Device0 G! P* [& z- _5 A' Y! Q: |! f# F
* 26 - Apparatus Thermal Device
. t+ @4 ?' ~: [ * 27 - Undervoltage Relay9 Q- u: C+ V3 v- F
* 29 - Isolating Contactor9 }7 L& C/ s: T& F9 k* y
* 30 - Annunciator Relay3 u8 R9 z: V) N/ d1 n
* 32 - Directional Power Relay8 A* l# l% q6 u: U: v [
* 36 - Polarity or Polarizing Voltage Devices! ~& j$ j% u, L& b/ }
* 37 - Undercurrent or Underpower Relay, O/ e& p/ B; x- N7 F9 M: R
* 38 - Bearing Protective Device S( P( F" E, b
* 39 - Mechanical Conduction Monitor' f3 B/ K$ w6 Y& ^% j
* 40 - Field Relay! d' G2 L5 B2 i' N9 J7 t/ [
* 41 - Field Circuit Breaker
, v1 v: h/ U+ Z3 M6 ~ v * 42 - Running Circuit Breaker
* s& o6 E$ |0 `8 D * 43 - Manual Transfer or Selector Device
4 [8 H- l, |0 s" c9 D * 46 - Reverse-phase or Phase-Balance Relay& o U) T" b& F+ o
* 47 - Phase-Sequence Voltage Relay% g% |3 M0 \( [/ G" {! j4 r
* 48 - Incomplete-Sequence Relay
1 H9 P: W, J3 `' b * 49 - Machine or Transformer Thermal Relay
# N" n& D5 I' T * 50 - Instantaneous Overcurrent8 h$ r' U# x. p: s: t2 Z* n
* 51 - AC Time Overcurrent Relay
0 o# Z& j) |! [" A* r- b8 { * 52 - AC Circuit Breaker# |1 F8 V9 R1 N% E, f" T) L
* 53 - Exciter or DC Generator Relay
1 }. o- i6 N- s/ s * 54 - High-Speed DC Circuit Breaker
0 d. S* y# o6 D/ c/ k. X/ r. n * 55 - Power Factor Relay3 z( \7 U2 t. f) M, X# x; ?
* 56 - Field Application Relay& L: D: i6 s6 d$ I8 }
* 59 - Overvoltage Relay3 X8 ?; d0 ^, I! |
* 60 - Voltage or Current Balance Relay
+ h, O8 {" R9 J * 61 - Machine Split Phase Current Balance
( B* f( h; i$ w" ] * 62 - Time-Delay Stopping or Opening Relay. r8 ]% w5 h$ X$ N/ N* M8 g
* 63 - Pressure Switch
, `* k# d& O! F' g) L * 64 - Ground Detector Relay; C3 Q q# V8 p2 @/ f
* 65 - Governor
/ i- x4 @" B7 R# _! _2 ?. x * 66 - Starts per Hour. @- Z6 t* l+ Q
* 67 - AC Directional Overcurrent Relay
% _ s4 u- w4 |" w( i * 68 - Blocking Relay
( F& d2 ~( G: y6 F * 69 - Permissive Control Device! W3 s- }& x6 H: ^6 l. }1 ?
* 71 - Level Switch
% x/ j7 @, k6 Z4 p& E% {8 t * 72 - DC Circuit Breaker
+ L4 i' k3 d8 ^ * 74 - Alarm Relay
4 y6 G: s! y& T2 h7 [ * 75 - Position Changing Mechanism
) q0 i( k5 h5 u+ W7 g * 76 - DC Overcurrent Relay
. z4 ]' @9 ?; A8 h& M9 W" P * 78 - Phase-Angle Measuring or Out-of-Step Protective Relay
$ V: I2 `6 z5 ]! r/ E9 z * 79 - AC-Reclosing Relay9 h4 U9 f1 i9 m; p
* 81 - Frequency Relay
( b& P4 x6 Z, e7 | * 83 - Automatic Selective Control or Transfer Relay
1 l& _+ x) X7 @, F7 `* f5 a * 84 - Operating Mechanism# n& {$ X* Y, [1 c G3 k( M
* 85 - Carrier or Pilot-Wire Receiver Relay: K- l& w) r" S* I
* 86 - Lockout Relay: M! k+ E, w# h& s+ C4 b
* 87 - Differential Protective Relay) J5 F7 X/ t- j- [
* 89 - Line Switch
$ b1 a+ j- t& v0 F% L! W * 90 - Regulating Device
# j6 t4 D( Y+ G6 n( I0 @5 ? * 91 - Voltage Directional Relay0 D* |0 x0 ^- R( @7 N& G
* 92 - Voltage and Power Directional Relay5 X+ z& ?3 ?& V2 E% I
* 94 - Tripping or Trip-Free Relay
* D0 U- N% o; I' f$ }9 m * 95 - Reluctance Torque Synchrocheck# d# K" S2 s. d9 x/ y& m# L
* 96 - Autoloading Relay |
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