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List of Device Numbers
) U. f: X- Z K* r' L/ [Click to learn more...' d i* E: G8 Y, o+ Z$ c
" K5 R+ B3 [* T9 k& D) x9 {+ g, y * 1 - Master Element
4 X( A7 T/ ~2 N4 x/ r5 P7 p' R/ ~ * 2 - Time Delay Starting or Closing Relay9 x; D5 O5 D. A H4 e
* 3 - Checking or Interlocking Relay
& C! g1 Z* Y2 b# L0 ]& q9 z * 4 - Master Contactor& o5 q. K; z7 F5 ]) M* e
* 5 - Stopping Device3 D/ G3 b5 `& A; N# Z( h+ ]
* 6 - Starting Circuit Breaker: Z' b4 \3 o v+ C) `3 A, L+ D- |
* 7 - Anode Circuit Breaker- U% K, V8 A/ `; ^
* 8 - Control Power Disconnecting Device
r& O7 h- k }& s* M( E * 9 - Reversing Device
0 C7 H. @9 M! D3 W7 w8 k4 }; {% | * 10 - Unit Sequence Switch
" f3 [- t! Z& V! {; t2 b5 A * 12 - Overspeed Device0 r. C4 ]3 n; G+ O# F' `
* 13 - Synchronous-speed Device
& f3 f+ G0 }* c7 ] * 14 - Underspeed Device
# e; m* D! y+ l; X% D * 15 - Speed - or Frequency-Matching Device
+ x9 q3 F1 U0 h, Y. ?6 X * 21 - Distance Relay! M6 T5 B0 s( b9 l
* 23 - Temperature Control Device
/ X' \3 x1 B. O( I * 25 - Synchronizing or Synchronism-Check Device. t- ^" t+ O# B4 V; g. G
* 26 - Apparatus Thermal Device
/ H- A1 `6 \# u4 M. a( U" G. Y * 27 - Undervoltage Relay0 e& t) b4 h) a8 M7 d" w1 k
* 29 - Isolating Contactor
8 p3 h: h H4 c: e. f S$ | * 30 - Annunciator Relay( i) E3 d) F" m( M* U7 w( H
* 32 - Directional Power Relay
5 Z3 q- F# C0 q6 g * 36 - Polarity or Polarizing Voltage Devices
$ k5 p, `4 ?; e" F8 ^3 |2 i * 37 - Undercurrent or Underpower Relay l I$ F) A8 V
* 38 - Bearing Protective Device
: A* H0 Z% L7 d3 p K * 39 - Mechanical Conduction Monitor& v" s$ C+ e# V7 U/ j9 p- w
* 40 - Field Relay
2 W& i( f# L) a * 41 - Field Circuit Breaker. f* e. k4 c3 \7 T7 a
* 42 - Running Circuit Breaker c! L1 p/ h+ d/ j( Y) ]
* 43 - Manual Transfer or Selector Device3 I, b% S% z% U' g# r' H
* 46 - Reverse-phase or Phase-Balance Relay
! m# Z- c N# T u- @8 X2 W * 47 - Phase-Sequence Voltage Relay @/ S8 a) S& F# N
* 48 - Incomplete-Sequence Relay: U- q @ z. W9 g
* 49 - Machine or Transformer Thermal Relay8 X3 o6 {0 t5 l6 C
* 50 - Instantaneous Overcurrent X: Q) E7 r4 k
* 51 - AC Time Overcurrent Relay9 X4 r- S) I/ f" V, \5 F: S8 o
* 52 - AC Circuit Breaker4 |4 C0 l8 x7 E5 E
* 53 - Exciter or DC Generator Relay6 ~9 d: N4 g* T9 ]3 x2 W0 U$ G, `2 a
* 54 - High-Speed DC Circuit Breaker8 X" ^* V" m) d, Y. b
* 55 - Power Factor Relay
) e5 ^& z; i* i. H4 o0 U/ t9 E * 56 - Field Application Relay
( z3 B( B- u" E: C * 59 - Overvoltage Relay& Q D1 t7 ]; n7 C/ _4 n/ S3 n
* 60 - Voltage or Current Balance Relay& R; B, _9 Y6 n. h5 P
* 61 - Machine Split Phase Current Balance
: c: H8 r" Y2 b9 ? * 62 - Time-Delay Stopping or Opening Relay
5 x; m# c- v1 i8 p/ G8 o1 |/ a * 63 - Pressure Switch
; J7 F8 D! v1 Z2 k6 R; R * 64 - Ground Detector Relay3 x% E' |, S/ W3 v
* 65 - Governor
( ?) f2 H( j# w) x8 q * 66 - Starts per Hour$ x9 I: f9 f0 H+ O) U* F! m
* 67 - AC Directional Overcurrent Relay
! R( ]* s1 d8 u * 68 - Blocking Relay- L5 ~. Q8 m( j" ^
* 69 - Permissive Control Device
; Q( A* B# v8 N/ y% E * 71 - Level Switch
5 Y4 m3 ^" R% y$ h, D2 ? * 72 - DC Circuit Breaker
# B S' L4 z, R * 74 - Alarm Relay
, t, g' m+ ` v * 75 - Position Changing Mechanism. }( Q0 M2 h/ D, P
* 76 - DC Overcurrent Relay
$ I3 W. L% l4 N# H: J * 78 - Phase-Angle Measuring or Out-of-Step Protective Relay4 f9 d& n" g7 T: H* a: r* x- b
* 79 - AC-Reclosing Relay
6 L4 U' Z; a5 T! p( n * 81 - Frequency Relay- J$ h Y% ]6 a; A) ~% `6 \& s
* 83 - Automatic Selective Control or Transfer Relay0 G+ S& ?! `% B7 o( t: J
* 84 - Operating Mechanism
) F, M7 I/ `5 A" O * 85 - Carrier or Pilot-Wire Receiver Relay% d p$ d3 l7 k/ N
* 86 - Lockout Relay
8 M9 ^4 Y2 `7 M. y9 n- ?5 @7 h! B3 \ * 87 - Differential Protective Relay
3 l' H, L/ Y7 s A( g4 N0 k * 89 - Line Switch4 I% D9 M/ U, q9 j2 R0 G1 M- c
* 90 - Regulating Device
8 Z7 J& _+ j; y; s0 N1 Z J * 91 - Voltage Directional Relay: t, u# L$ R8 ]) Y0 G. X& V! i0 O$ c
* 92 - Voltage and Power Directional Relay2 x! l/ h5 z0 k& ^" \
* 94 - Tripping or Trip-Free Relay$ o7 {+ X( J& R( w& j
* 95 - Reluctance Torque Synchrocheck8 y0 R8 Z/ r- ^" j% |' x
* 96 - Autoloading Relay |
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