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List of Device Numbers
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% F4 Q9 b6 D4 T5 J$ f0 W * 1 - Master Element$ _! b2 N# s% m9 p
* 2 - Time Delay Starting or Closing Relay% w* x1 ?6 ^3 l" Q* X3 |2 H
* 3 - Checking or Interlocking Relay
6 Z3 v9 l* s& } w& F/ U. k- Q7 { * 4 - Master Contactor
% ?1 f. Q4 V* Y* q * 5 - Stopping Device, ~* M; s3 t7 k
* 6 - Starting Circuit Breaker
7 K/ z" }! `* H i: } * 7 - Anode Circuit Breaker+ ?1 H$ H5 P* d$ O
* 8 - Control Power Disconnecting Device: q. t# F' U$ [* ^( S) v
* 9 - Reversing Device4 y i: X8 H& N9 S9 o( o: q: M8 ~# z
* 10 - Unit Sequence Switch
' Q& k/ g8 ]4 J" B- u * 12 - Overspeed Device: w* J7 o; Y, n$ h W, g- x4 R' o. Z
* 13 - Synchronous-speed Device
7 O# g% s: j( t$ u' E; ~ * 14 - Underspeed Device2 [, | s0 g h$ @* ~; s. n
* 15 - Speed - or Frequency-Matching Device
+ u! w% a3 N. g G) ~ * 21 - Distance Relay
( O# P" I! p1 J& t4 p * 23 - Temperature Control Device; H7 E/ z6 _8 T _
* 25 - Synchronizing or Synchronism-Check Device3 b' v q ]6 p. S. S
* 26 - Apparatus Thermal Device
! ]5 F) R9 J* U& t; q, i * 27 - Undervoltage Relay
- n' m: a6 T% ^; Z * 29 - Isolating Contactor
* k3 Z2 m- G& p# M6 I8 } * 30 - Annunciator Relay
5 A. d, q: ~% X1 m H# r * 32 - Directional Power Relay W# U) `3 G" M! S, X% P* [( X/ Z/ x
* 36 - Polarity or Polarizing Voltage Devices
! D4 f3 P9 L. j9 }2 a$ P g' A* _ * 37 - Undercurrent or Underpower Relay
! s. v% l4 }: x8 G * 38 - Bearing Protective Device9 f+ }& R6 x! E x( \5 g: z
* 39 - Mechanical Conduction Monitor
' W J1 _& I6 T' T0 S6 n& @' j * 40 - Field Relay
( m+ Y) |$ I) F" g& C& d * 41 - Field Circuit Breaker
8 ^6 [. y1 L* M" l0 W1 R9 g, T4 k * 42 - Running Circuit Breaker
$ u/ d5 g, f- o7 V * 43 - Manual Transfer or Selector Device
7 F: {5 l `( v9 o( w * 46 - Reverse-phase or Phase-Balance Relay
/ H3 J' ]9 Y4 V& S * 47 - Phase-Sequence Voltage Relay( x0 ]+ f" ^ w* B8 K
* 48 - Incomplete-Sequence Relay
1 ]. p4 j) Q; D9 |* @2 A * 49 - Machine or Transformer Thermal Relay
) w3 u$ `' @% p9 O! k- e9 E * 50 - Instantaneous Overcurrent
% Z3 \3 s- _/ j4 j0 m% X * 51 - AC Time Overcurrent Relay# x* C0 q, @0 r6 w4 g; [) G
* 52 - AC Circuit Breaker" ]+ F; W8 x! G/ a& F8 b$ I8 b. w T
* 53 - Exciter or DC Generator Relay$ ]+ a- h2 i' D# t
* 54 - High-Speed DC Circuit Breaker& V, T. `- j R5 Y* A* S% U) [4 ~
* 55 - Power Factor Relay6 T, h; M7 I, Q9 }
* 56 - Field Application Relay+ s! N" v& r4 {0 {- K; q) Z+ Q
* 59 - Overvoltage Relay
. H1 y# Z6 |! c/ d6 [' x. g * 60 - Voltage or Current Balance Relay8 t! H$ ]6 c8 f/ O8 G( u6 h" ~
* 61 - Machine Split Phase Current Balance
9 L/ g; q3 @; W- @! X2 @5 o * 62 - Time-Delay Stopping or Opening Relay2 f6 I' `, s) z9 f# ?- i8 _) W
* 63 - Pressure Switch
: a6 W( W% z. T3 t/ R+ b * 64 - Ground Detector Relay
( a( ^4 s2 L; f0 o5 i * 65 - Governor# N, O8 }" P( d/ F+ U9 [/ |
* 66 - Starts per Hour# ^+ |! Z& j; c: t, X9 h/ w5 p9 N! ]
* 67 - AC Directional Overcurrent Relay+ _5 C7 a1 a) x8 i- F( e& i6 g: D
* 68 - Blocking Relay! ?0 r* Z& X% |3 K
* 69 - Permissive Control Device
; q+ m* P5 k: j& Z F8 o * 71 - Level Switch
& L9 h( T9 c/ \( Z8 ~ * 72 - DC Circuit Breaker
9 j$ d" q2 }% f. [) K, K5 } * 74 - Alarm Relay0 b1 S) V" m5 `' ^+ P1 Q
* 75 - Position Changing Mechanism
; B3 k- } t( T+ T * 76 - DC Overcurrent Relay$ b- }! s3 [+ v3 l: z
* 78 - Phase-Angle Measuring or Out-of-Step Protective Relay
) U7 j) V) t/ m: o. k' o' j% | * 79 - AC-Reclosing Relay+ O( d( Q* I7 w3 ]2 P( ^6 l
* 81 - Frequency Relay
1 `% a" ^5 u( Z * 83 - Automatic Selective Control or Transfer Relay: i3 a% k: m6 k& ?2 M
* 84 - Operating Mechanism$ i' }4 [" S$ @9 x3 v0 L( c
* 85 - Carrier or Pilot-Wire Receiver Relay
: H7 c' u: D( y N( h7 _ P * 86 - Lockout Relay
# Q/ y" K% y$ g# f6 F) ^: F; ] * 87 - Differential Protective Relay/ V+ a/ B" d! @" E% D0 O T
* 89 - Line Switch
G4 U, h2 [7 C * 90 - Regulating Device: K# m6 G9 _+ v# C
* 91 - Voltage Directional Relay
: |! `. p/ F7 }0 T6 D * 92 - Voltage and Power Directional Relay
6 F/ H) I* i" v' C" ^3 [5 Y* C/ ` * 94 - Tripping or Trip-Free Relay! x4 m0 U _& l4 L% I8 k
* 95 - Reluctance Torque Synchrocheck
+ c) W' I# B( q. C. _, _ * 96 - Autoloading Relay |
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