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List of Device Numbers
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* 1 - Master Element* z' [0 p( d) t) k) Z
* 2 - Time Delay Starting or Closing Relay
! N- M' z3 h& u& r/ e& X1 l * 3 - Checking or Interlocking Relay
( R8 U7 e4 |; i$ L/ x9 V0 ?/ l( X: p * 4 - Master Contactor
) k. `2 `/ F# \3 Y5 V * 5 - Stopping Device7 x2 _4 r9 ?' f
* 6 - Starting Circuit Breaker
8 ^' r. B5 i4 R/ d9 |% \' d- M, p * 7 - Anode Circuit Breaker
1 ?7 B# ~/ I( M' O7 U * 8 - Control Power Disconnecting Device
T5 [& G" @6 `* j8 W: @ * 9 - Reversing Device9 p) g& N& G$ G6 S' I: Q6 q
* 10 - Unit Sequence Switch
* l5 y1 a) g7 y- s * 12 - Overspeed Device
, u/ y! L' E6 {. i" o! \ * 13 - Synchronous-speed Device
9 t$ s) T! e! ?+ O' I4 Z: K9 M * 14 - Underspeed Device, T1 j, M! }0 Y7 ^
* 15 - Speed - or Frequency-Matching Device
" c: o4 q, z' r * 21 - Distance Relay; J1 R: J8 o: c$ z; @" a
* 23 - Temperature Control Device
3 C* J6 y5 `6 a# S6 u: ?, f * 25 - Synchronizing or Synchronism-Check Device
1 ~/ `- o8 P6 V3 W1 J * 26 - Apparatus Thermal Device: G& q: x: [+ M7 K6 l# ^3 _
* 27 - Undervoltage Relay L8 x5 F: {8 Z- I& F+ h) B8 |
* 29 - Isolating Contactor% b" g. k v. L7 y" H" e
* 30 - Annunciator Relay6 w) p' d1 b* l( z4 e9 b$ E$ e8 i
* 32 - Directional Power Relay
2 V/ }5 _6 z# f t1 I1 x * 36 - Polarity or Polarizing Voltage Devices4 i- |6 ?8 l( `$ O" Y
* 37 - Undercurrent or Underpower Relay# R3 e* H+ \$ q4 w* a4 J0 \
* 38 - Bearing Protective Device
7 _2 k1 r& Q8 e d1 R * 39 - Mechanical Conduction Monitor5 z K, ]* Y; J; N% \
* 40 - Field Relay
+ v4 o% S( b$ F/ D1 y * 41 - Field Circuit Breaker9 n! i( m4 P' @. i5 P
* 42 - Running Circuit Breaker* R- a4 x1 ^: p) U
* 43 - Manual Transfer or Selector Device
1 C0 j# ~ s2 e% Y1 k* [ * 46 - Reverse-phase or Phase-Balance Relay( n7 e2 R1 W! C }9 a1 O; G# r
* 47 - Phase-Sequence Voltage Relay6 L1 c0 {% x7 O8 {& y/ d0 s
* 48 - Incomplete-Sequence Relay7 b# c2 f# W# g2 ] h5 b
* 49 - Machine or Transformer Thermal Relay7 i, M7 \1 I$ h4 w3 o( @
* 50 - Instantaneous Overcurrent
( M: V/ A( W7 S: U8 W7 C * 51 - AC Time Overcurrent Relay* h! W8 s3 u; o# n" l/ X E
* 52 - AC Circuit Breaker
. z- p5 E, a3 R# r2 g * 53 - Exciter or DC Generator Relay
, s5 `2 Y7 B, s! n5 b * 54 - High-Speed DC Circuit Breaker: ~9 }* P; J) B- \6 L
* 55 - Power Factor Relay
3 G# `5 j: k4 E# A! Y" p8 h0 T# b * 56 - Field Application Relay
9 w6 a, h. _) \8 T8 H) U$ D& A( z V * 59 - Overvoltage Relay6 ~4 A k" p: v6 q7 s0 \+ o' V
* 60 - Voltage or Current Balance Relay
! g/ l. L) P" A5 G; o * 61 - Machine Split Phase Current Balance6 A0 z* I& o0 v- A, h, b' ~9 z8 U
* 62 - Time-Delay Stopping or Opening Relay
$ d2 o- H. U4 C& C! y * 63 - Pressure Switch
% K1 p- x& ^- {' { * 64 - Ground Detector Relay
2 P0 X; ^+ B( j) u8 F% e * 65 - Governor" W/ o/ \3 m3 M* U' I) }7 J
* 66 - Starts per Hour- C s9 ~; U' }( }$ X+ O' T
* 67 - AC Directional Overcurrent Relay0 p* P7 ?3 ]. y5 n4 g" P
* 68 - Blocking Relay0 {+ C% d# L* n* R1 m+ v
* 69 - Permissive Control Device
. `/ k9 J4 d! P * 71 - Level Switch7 f% B* E/ G$ @5 y; q
* 72 - DC Circuit Breaker# Y) l3 n ` U0 Z: S0 f8 E* d+ W; J
* 74 - Alarm Relay4 { O% [" Z- f* w+ R) w5 b
* 75 - Position Changing Mechanism
, T' a }" `% [( `* k * 76 - DC Overcurrent Relay
) \+ V8 q: g* [: p! G * 78 - Phase-Angle Measuring or Out-of-Step Protective Relay% |/ G* n1 C/ c H
* 79 - AC-Reclosing Relay
( j' @* [1 `; p$ p/ S& } * 81 - Frequency Relay+ H$ g! K$ j% z2 A
* 83 - Automatic Selective Control or Transfer Relay& L+ W# L: D: R- M6 N4 [
* 84 - Operating Mechanism5 V2 z6 F& G8 s [5 _: L, v
* 85 - Carrier or Pilot-Wire Receiver Relay3 f- P# Z/ }7 S8 u
* 86 - Lockout Relay
" F! }! t9 \/ c% n" _ * 87 - Differential Protective Relay2 ]8 w* i* }4 H. r& F0 z, E$ b
* 89 - Line Switch
2 Z' Z) s: w& o * 90 - Regulating Device
5 a& U3 @# `: e5 Z: D6 G, H) K * 91 - Voltage Directional Relay
5 O1 c% `* V8 O+ A" [0 p * 92 - Voltage and Power Directional Relay
; g2 R2 T' u* w q * 94 - Tripping or Trip-Free Relay H/ m! A w3 K, Z- G# }% i2 L
* 95 - Reluctance Torque Synchrocheck5 r& f0 d0 ~4 w$ @3 u) |, ^- B. H' W
* 96 - Autoloading Relay |
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