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List of Device Numbers
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* 1 - Master Element/ ~, x6 b) O w+ [
* 2 - Time Delay Starting or Closing Relay
' s9 s+ K: `7 u* s' u * 3 - Checking or Interlocking Relay
t) S0 l1 h4 o2 S5 c * 4 - Master Contactor% }9 i3 G9 Z* a
* 5 - Stopping Device
g2 I) v+ T2 b4 c" ` * 6 - Starting Circuit Breaker, L5 t4 _7 H+ \. D2 ? }( J
* 7 - Anode Circuit Breaker
( t6 g1 U7 m, m * 8 - Control Power Disconnecting Device
& i+ H; a3 |. f- m * 9 - Reversing Device
5 r6 E0 @" h! d- {# S * 10 - Unit Sequence Switch
- @7 F* L! h5 w * 12 - Overspeed Device e% t" G+ q: f: U* |. }
* 13 - Synchronous-speed Device, H; Z4 |4 _3 C7 B- n1 K3 x6 ?
* 14 - Underspeed Device: F4 o5 d# H+ Q! T7 d) r H m6 Q
* 15 - Speed - or Frequency-Matching Device+ Y# J6 g) _9 v4 I) E3 X$ C
* 21 - Distance Relay
# V; ?1 r5 b' p, ?, B * 23 - Temperature Control Device
2 l, v; u0 ] v: f: o: X: b5 Z8 a * 25 - Synchronizing or Synchronism-Check Device2 d( K$ F( L, u/ }0 G
* 26 - Apparatus Thermal Device
8 A+ i% o/ `/ O9 U' D% Q& g" K * 27 - Undervoltage Relay$ _" a& a8 w# P2 h0 y' |
* 29 - Isolating Contactor
+ h; _ N* f5 w' k! F2 U$ A * 30 - Annunciator Relay& i- o) r# |! ^- Z3 A
* 32 - Directional Power Relay( D6 ]9 {' _8 z0 S
* 36 - Polarity or Polarizing Voltage Devices
$ @/ V3 T3 R! L1 w; T * 37 - Undercurrent or Underpower Relay
+ u; L$ G) p: w, q * 38 - Bearing Protective Device
' o+ w4 ?" T* H3 P7 T! y) Y * 39 - Mechanical Conduction Monitor H4 c1 c+ U" u; K
* 40 - Field Relay
9 d" y9 [3 q4 U' O2 ^3 i * 41 - Field Circuit Breaker
" Q) h, F# \: z! B- F * 42 - Running Circuit Breaker
$ N* x3 i+ O) M1 f }& w/ k * 43 - Manual Transfer or Selector Device
7 M, R" N% n% o1 f0 U * 46 - Reverse-phase or Phase-Balance Relay2 V( V' D6 _9 _5 p
* 47 - Phase-Sequence Voltage Relay
. Z5 H2 _8 M6 r5 @5 S) j6 A+ K * 48 - Incomplete-Sequence Relay
" e, \8 }2 s2 T * 49 - Machine or Transformer Thermal Relay
: o- p3 H. R% A# d% W * 50 - Instantaneous Overcurrent
1 L. Z% ]' r/ A' s * 51 - AC Time Overcurrent Relay6 x3 R) t0 f2 W2 }* p* Y8 H9 Q8 t
* 52 - AC Circuit Breaker
, I( g4 C3 s' ]% O& z" \ * 53 - Exciter or DC Generator Relay
) R" X8 G: }5 Y6 Q- D2 | * 54 - High-Speed DC Circuit Breaker, `$ N& K- f, P, X. s
* 55 - Power Factor Relay
1 _3 p# n- R5 |0 |, K3 D8 C * 56 - Field Application Relay: ]+ c) l. Q, A9 ]4 S* {' U' h
* 59 - Overvoltage Relay: g8 J* {9 y5 ]! I) d$ |; [
* 60 - Voltage or Current Balance Relay
+ C4 V) x2 L- M: V. u8 m& e7 s * 61 - Machine Split Phase Current Balance. U( v2 z N6 L, x2 h/ u
* 62 - Time-Delay Stopping or Opening Relay
F) N* t, M" o9 e3 Y$ J! c, f * 63 - Pressure Switch
# ~- k5 {: b3 l+ _: ^2 _# c$ H/ ?, w# K * 64 - Ground Detector Relay
@* D& s2 ^% q' R6 S, } * 65 - Governor3 Z7 W' m4 [ P3 ^
* 66 - Starts per Hour
- k+ S: E- C1 \* ? * 67 - AC Directional Overcurrent Relay4 @' d* f7 b6 f0 H: E8 i) L" U
* 68 - Blocking Relay
4 M' b$ w$ z i" V * 69 - Permissive Control Device
$ L4 M! t4 ], z * 71 - Level Switch/ X- P$ _+ Z% y8 ?
* 72 - DC Circuit Breaker1 a: w7 U( B# u' b% b* y4 l0 Q
* 74 - Alarm Relay
5 n: M$ U0 S7 Z- a- V * 75 - Position Changing Mechanism( `1 S3 J8 l! {9 q$ u1 b" s' p
* 76 - DC Overcurrent Relay+ i1 F" w" E0 W4 h( s; f
* 78 - Phase-Angle Measuring or Out-of-Step Protective Relay
2 l: ~: q& h8 ]7 w * 79 - AC-Reclosing Relay" S3 k4 ?$ {1 L/ o! ~6 Y
* 81 - Frequency Relay
/ W6 l! k" ^9 q * 83 - Automatic Selective Control or Transfer Relay3 Y6 w: S7 A, y% B
* 84 - Operating Mechanism
5 o- w. p$ \* l! p, M% d * 85 - Carrier or Pilot-Wire Receiver Relay7 Q% _; E" p6 T# y
* 86 - Lockout Relay% ]- Z- P3 V9 V" Y5 n
* 87 - Differential Protective Relay9 V S0 b) d; E
* 89 - Line Switch
4 _$ [/ R0 W% H4 U, R; h * 90 - Regulating Device
1 I& ~% ?2 Q) ^3 S- \" T+ q * 91 - Voltage Directional Relay
. S# t; V6 b0 O. P * 92 - Voltage and Power Directional Relay P+ W" D* v; C9 r2 _( F& y
* 94 - Tripping or Trip-Free Relay
4 F7 l( Z; W6 H: n) c; l * 95 - Reluctance Torque Synchrocheck6 K3 K% {8 k n. u& `8 W$ r
* 96 - Autoloading Relay |
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