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List of Device Numbers 
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    * 1 - Master Element 
8 B: b8 z' h! J" o+ ]) }4 F0 |, Y    * 2 - Time Delay Starting or Closing Relay 
: u% n: a% X/ T, l% R! u    * 3 - Checking or Interlocking Relay 
0 T, d2 j4 `9 R8 F2 t; k6 p    * 4 - Master Contactor 
5 U3 o' t" S' F6 |9 D/ W0 G    * 5 - Stopping Device 
' N4 d( g. C: K4 m' u- t    * 6 - Starting Circuit Breaker) N' p" T* q2 v/ y) ?$ O 
    * 7 - Anode Circuit Breaker! b9 j# q9 z9 o) U9 y 
    * 8 - Control Power Disconnecting Device+ e, R5 z% l) ^) S: l: j 
    * 9 - Reversing Device, Y+ Z7 U5 b* z( S1 T! N 
    * 10 - Unit Sequence Switch8 l% T) h: K! u) \% B 
    * 12 - Overspeed Device, K$ |- E8 A1 z3 H: q 
    * 13 - Synchronous-speed Device4 U" l; A' b8 m7 Y. a. M) L 
    * 14 - Underspeed Device" g$ |' ~( B6 ^% A 
    * 15 - Speed - or Frequency-Matching Device% A5 K0 v5 q8 `# F8 N% L% t' m 
    * 21 - Distance Relay 
4 Q/ c% R& c; m: U# n1 ?    * 23 - Temperature Control Device7 Q3 }) p7 |1 x  ^; w: t& [ 
    * 25 - Synchronizing or Synchronism-Check Device2 p$ x# o% l, L4 j3 O& w 
    * 26 - Apparatus Thermal Device 
6 b1 U, k( ]% s$ p5 [4 ?7 A    * 27 - Undervoltage Relay 
) s# v/ Z# Q, B* l. x7 I; Z    * 29 - Isolating Contactor: a+ p4 x+ }6 u. X+ W" v 
    * 30 - Annunciator Relay% r1 H% ]& N- L+ B( T4 W 
    * 32 - Directional Power Relay 
+ o+ B* [2 @1 N; ?& C/ ]4 O3 T/ e    * 36 - Polarity or Polarizing Voltage Devices5 O( p7 Q3 b( R2 X9 w9 w3 g 
    * 37 - Undercurrent or Underpower Relay  Z- x# C! W/ c! B" x 
    * 38 - Bearing Protective Device 
$ M* C' J4 }( M2 y1 a; S  R; ]    * 39 - Mechanical Conduction Monitor 
5 p7 {- Y2 g6 L4 d# F    * 40 - Field Relay 
/ L: T9 S  L. D# k7 O    * 41 - Field Circuit Breaker/ ?* M4 w, {; X5 u; k: r" ]9 | 
    * 42 - Running Circuit Breaker' b7 r3 U6 p( P% U; E 
    * 43 - Manual Transfer or Selector Device/ w+ W* q+ G7 q. _, r* { 
    * 46 - Reverse-phase or Phase-Balance Relay3 f! @% p. G8 `- @, y  L/ `' e 
    * 47 - Phase-Sequence Voltage Relay) o6 W$ V& U  F5 t 
    * 48 - Incomplete-Sequence Relay 
- r- o$ K# X7 e2 q4 J4 R    * 49 - Machine or Transformer Thermal Relay 
1 [# R4 `6 [$ ~- o: |" }    * 50 - Instantaneous Overcurrent 
, ^1 o+ e. _* C7 c    * 51 - AC Time Overcurrent Relay 
+ `3 l: G0 \1 O$ c0 T    * 52 - AC Circuit Breaker 
, P$ G0 B& r/ I( Z    * 53 - Exciter or DC Generator Relay 
9 u3 M9 l$ U5 L0 O/ n4 s    * 54 - High-Speed DC Circuit Breaker; v* b: w2 S0 \3 l# x3 i 
    * 55 - Power Factor Relay1 [$ n4 _& L4 g' B, r3 q8 ? 
    * 56 - Field Application Relay 
) Z, Y" Z; B6 d  `( }    * 59 - Overvoltage Relay 
* \% P: {4 a. U+ [6 u& O1 U0 I0 R    * 60 - Voltage or Current Balance Relay% B$ ]) {7 o9 b. Z 
    * 61 - Machine Split Phase Current Balance( \8 t+ o5 w- ^; M- x! @5 W8 C8 p 
    * 62 - Time-Delay Stopping or Opening Relay( j; s3 r3 h, d7 A( f+ D  ~ 
    * 63 - Pressure Switch 
, V( }- K/ y) t. w) f) M& k& J    * 64 - Ground Detector Relay 
% N, t$ O* ?" V2 s5 N" s6 ^    * 65 - Governor, J, [. j7 `3 i) l! w* _2 [ 
    * 66 - Starts per Hour 
" D8 S  N# K4 e7 f0 P  c# o2 A0 W    * 67 - AC Directional Overcurrent Relay1 i) b0 m% W. e& T 
    * 68 - Blocking Relay 
( {; i/ Z& [  b: A4 `, S    * 69 - Permissive Control Device1 k& r" T# f. a 
    * 71 - Level Switch" q( k6 M8 j; ~% S) i1 t 
    * 72 - DC Circuit Breaker 
& X0 B0 ^6 l( E) e. b* I( _    * 74 - Alarm Relay 
8 Z- z- t3 L! h0 f4 u! i    * 75 - Position Changing Mechanism 
. H5 A5 `4 [- h5 H& E! T' z    * 76 - DC Overcurrent Relay 
2 K$ l' T# h3 Z) T5 k0 d: k    * 78 - Phase-Angle Measuring or Out-of-Step Protective Relay' c0 C+ a5 Z: ?! K/ Q 
    * 79 - AC-Reclosing Relay 
7 Z' l( H- P8 |1 I% u$ E$ G    * 81 - Frequency Relay7 `" [# T) z- O0 I$ t6 ]6 \ 
    * 83 - Automatic Selective Control or Transfer Relay. m! [9 D4 v5 k8 k 
    * 84 - Operating Mechanism" C: r" I! |+ P' z 
    * 85 - Carrier or Pilot-Wire Receiver Relay4 ~# }- x' A' W" A* I; c# V 
    * 86 - Lockout Relay 
5 I1 X4 ^4 w0 G5 Z/ ^    * 87 - Differential Protective Relay! O) E# V6 N1 T( _ 
    * 89 - Line Switch 
2 J5 X8 m. L1 I. j5 k7 K    * 90 - Regulating Device. ]8 O$ H, n: I; j2 g# E. I( a 
    * 91 - Voltage Directional Relay# J8 p8 w( J% V  H* {( x3 {3 J 
    * 92 - Voltage and Power Directional Relay  x9 d9 }- Z/ Z( ]% J7 n6 q 
    * 94 - Tripping or Trip-Free Relay' I& p+ A4 v& M2 ?: b 
    * 95 - Reluctance Torque Synchrocheck' ]1 X4 g) K; g. u$ E 
    * 96 - Autoloading Relay |   
 
 
 
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