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List of Device Numbers
4 c# h" W' i; `; qClick to learn more..." D2 R9 k9 G' P7 {; D3 H( C
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* 1 - Master Element! L8 Y) j w) b" K. M! l \- G
* 2 - Time Delay Starting or Closing Relay
& V/ ]3 ^9 D J' n4 Z * 3 - Checking or Interlocking Relay# h9 a! C% }2 N. |/ X% S
* 4 - Master Contactor2 k7 M* {4 F& z$ A4 e
* 5 - Stopping Device" u( E5 t- a3 g$ P9 X5 k3 n& R
* 6 - Starting Circuit Breaker
( j0 }1 P. I/ I5 ` * 7 - Anode Circuit Breaker. l! n* N. b% r& o2 j& `
* 8 - Control Power Disconnecting Device0 ~* i, z. j2 E# p* Z
* 9 - Reversing Device: P( a" G s' S; V; U
* 10 - Unit Sequence Switch. [. f! z2 b9 }" j1 j
* 12 - Overspeed Device, Y( F: O2 }( E- M9 b6 M( L
* 13 - Synchronous-speed Device4 w; m: I4 K! n% d% }' D
* 14 - Underspeed Device9 I* S* F, z* I |5 W; b
* 15 - Speed - or Frequency-Matching Device
$ |# W3 |% j+ t$ P) K0 @5 j# V * 21 - Distance Relay* H, z* F( b6 O
* 23 - Temperature Control Device* F7 a, W1 _4 D8 u/ h/ \& x3 M9 _
* 25 - Synchronizing or Synchronism-Check Device$ T- Y @" {6 t: _3 H
* 26 - Apparatus Thermal Device
' q s7 R- q6 y8 Q5 y/ m( D" d: h9 y6 U * 27 - Undervoltage Relay2 w! h! o& k1 A( X; B: a
* 29 - Isolating Contactor
1 [1 s9 C A. n * 30 - Annunciator Relay
" h+ ~0 f& h1 X" j$ } * 32 - Directional Power Relay" n1 q3 I" ^/ M) J4 k9 n8 \
* 36 - Polarity or Polarizing Voltage Devices' a; w6 S2 U+ y
* 37 - Undercurrent or Underpower Relay
: B( E- r V1 n2 d: E% V- L * 38 - Bearing Protective Device- j0 i0 ?5 N+ J: ?+ d! {6 n
* 39 - Mechanical Conduction Monitor, c s. h, R) D- Q3 M# h
* 40 - Field Relay
1 s. ~8 x8 C+ q' K4 } * 41 - Field Circuit Breaker) k" P2 K* i( B1 ^$ q" v0 e& d3 c
* 42 - Running Circuit Breaker
; @+ B4 a7 K4 c5 W7 ~0 d * 43 - Manual Transfer or Selector Device
! y$ y& ^. T, e0 G6 _4 O * 46 - Reverse-phase or Phase-Balance Relay2 ?* l( R' F# C5 \% h
* 47 - Phase-Sequence Voltage Relay
( X: v. @# b3 b: H6 V% x7 C3 @ * 48 - Incomplete-Sequence Relay
& ~) f# Y, `/ E2 i. c* `4 ~ * 49 - Machine or Transformer Thermal Relay S! Q& u8 N( F+ S
* 50 - Instantaneous Overcurrent
6 ?2 L9 C; m) v5 L, P8 j% Z * 51 - AC Time Overcurrent Relay5 g& c8 q( X$ C, R7 `
* 52 - AC Circuit Breaker& u0 S# }1 K' a5 I5 F1 F( a1 `
* 53 - Exciter or DC Generator Relay
( j i9 L ^* a$ Q7 e9 d * 54 - High-Speed DC Circuit Breaker+ H9 c9 A4 }) T u. n+ }- J4 T
* 55 - Power Factor Relay0 m: M1 ~2 D' G5 ?3 O
* 56 - Field Application Relay
* x" P: |( O5 b3 i& a: G * 59 - Overvoltage Relay
1 J, M. K T9 I4 |9 f( e8 B8 S: { * 60 - Voltage or Current Balance Relay
7 M6 z& x$ s/ I8 P * 61 - Machine Split Phase Current Balance: a" ]3 c1 ?4 }+ |, e
* 62 - Time-Delay Stopping or Opening Relay4 {/ h9 W j/ S3 L- k
* 63 - Pressure Switch2 l8 }$ A6 K! q5 H6 g
* 64 - Ground Detector Relay
" z+ `8 i- z5 u( R$ ] * 65 - Governor4 x6 n% o$ F6 J: s
* 66 - Starts per Hour
! d1 h& R c5 q* j* y7 b * 67 - AC Directional Overcurrent Relay4 X+ t. R+ F/ O9 c" }) F0 k! s; o
* 68 - Blocking Relay9 D9 P! f* ^, _; p ?
* 69 - Permissive Control Device3 ^" M6 |1 @: v" |' o9 E) |
* 71 - Level Switch3 U% k1 O3 H2 ^8 e& v9 C9 K
* 72 - DC Circuit Breaker- W8 d/ ?! `+ O7 ]& n, l
* 74 - Alarm Relay
, m6 r6 X! m0 r4 I% J7 p4 S+ C. O * 75 - Position Changing Mechanism
0 g9 w$ Z$ y3 R+ } * 76 - DC Overcurrent Relay
# _& c \$ q7 X6 H * 78 - Phase-Angle Measuring or Out-of-Step Protective Relay
: x0 g3 k8 @: c7 h3 E4 t * 79 - AC-Reclosing Relay
d. j: R' l$ `: U * 81 - Frequency Relay
1 ]5 d. D$ r7 F( ]6 q * 83 - Automatic Selective Control or Transfer Relay
4 J& s9 y; m: s' X0 L j * 84 - Operating Mechanism/ c# t) v+ j* A7 B4 l0 X. X* ]
* 85 - Carrier or Pilot-Wire Receiver Relay
3 k( M: d8 x( {5 P- b * 86 - Lockout Relay
9 t, J# r ?+ U9 c4 e3 I& l6 \3 Q * 87 - Differential Protective Relay) P7 p- e4 D% ?6 V3 w
* 89 - Line Switch
/ H; d# G6 A( b+ U0 a * 90 - Regulating Device
& D0 m7 G9 s$ v" ]& |, w7 r9 I * 91 - Voltage Directional Relay
9 j" H+ n' O3 ?3 R3 T( S1 f * 92 - Voltage and Power Directional Relay& [3 T6 y1 _+ p' ^
* 94 - Tripping or Trip-Free Relay
/ S/ t7 o8 @! N+ F# H7 S! a * 95 - Reluctance Torque Synchrocheck
9 V' T( S. P) H; `; O _+ C* k V * 96 - Autoloading Relay |
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