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SPAD 346 C Stabilized Differential Relay
User´s manual and Technical description

f n = 50Hz
60Hz

I I I I

n n n n

= = = =

1A 1A 1A 1A

5A 5A 5A 5A

(I 1 ) (I 2 ) ( I 01 ) ( I 02 )

3∆ I >
2
I1 Id I2
L1 L2 L3 IRF

∆ I 01 > ∆ I 02 >
ΣI 1 ΣI 2 I 01 I d1 I d2 I 02 IRF

3I >
I I L1 I L2 I L3 I o IRF

5

SPAD 346 C
80...265 V – ~ 18...80 V –

U aux

P / I n[%] S [%] I 2tp / I n

RESET STEP

P 1 /I n [ % ] RESET t 01 > [ s ] STEP P 2 /I n [ % ] t 02 > [ s ] I 01 / I n I 01 / Σ I 1 [ % ] I 02 / I n I 02 / Σ I 2 [ % ] I 2f / I 1f (I 01 ) > [ %] I 2f / I 1f (I 02 ) > [ %] I 1 /I n I 2 /I n

I >/I n t > [s] k I >> / I n t >> [ s ] I >>> /I n t >>> [ s ] I 0 >/I n t 0 > [s ] k0 I 0 >> / I n t 0 >> [s ]

RESET STEP

OPERATION INDICATORS U1 SPCD3D53 U2 SPCD 2D55 U3 SPCJ 4D28

I d / I n >> I d2f / I d1f > [ % ] I d5f / I d1f > [ % ] I d5f / I d1f >> [ % ] I 1 /In I 2 /In
PROGRAM

0 0 0 0
1 3 ∆ I > Trip 2 3 ∆ I >> Trip 3 I d2f > Block / I d5f > Block 4 BS1 5 BS2 6 BS3 7 BS4 8 BS5 A CBFP Trip

0 0 0 0
1 2 3 4 5 6 7 8 9 0 II A ∆ I 01 > Start ∆ I 01 > Trip
I 2f (I 01 ) > Block ∆ I 02 > Start I 2f (I 02 ) > Block
BS1 BS2 BS3 BS4BS5 CBFP Trip

0 0 0 0
1 2 3 4 5 6 7 8 9 0 II A
I > Start I > Trip I >> Start I >> Trip I >>> Start I >>> Trip I 0 > Start I 0 > Trip I 0 >> Start I 0 >> Trip ∆ I > Trip
CBFP Trip
0021A

∆ I 02 > Trip

PROGRAM

∆ I > [%] t ∆ > [s ] SGF SGB SGR

PROGRAM

SGF SGB SGR TRIP

SGF SGB SGR TRIP
0029A 0023A

TRIP

0199A

RS 621

Ser.No.

SPCD 3D53

SPCD 2D55

SPCJ 4D28 1MRS 750096-MUM EN
Issued 1996-08-08 Modified 2002-04-12 Version F (replaces 34 SPAD 5 EN1) Checked MK Approved OL
Data subject to change without notice

SPAD 346 C Stabilized Differential Relay

Contents

Features .......................................................................................................................... 3 Application..................................................................................................................... 4 Description of function .................................................................................................. 4 Three-phase stabilized differential relay module SPCD 3D53 ................................... 4 Earth-fault relay module SPCD2D55....................................................................... 6 Combined overcurrent and earth-fault relay module SPCJ 4D28.............................. 8 Connection diagram ....................................................................................................... 9 Connections ................................................................................................................. 10 Control input and output relaymodule ........................................................................ 11 Intermodular signals (modified 1997-10) ...................................................................... 12 Power supply module ................................................................................................... 13 Operation indicators..................................................................................................... 14 Technical data (modified 2002-04) ............................................................................... 15 Recommendations for current transformers .................................................................. 18 Circuit-breaker control................................................................................................. 20 Application examples .................................................................................................... 21 Setting instructions ....................................................................................................... 25 Commissioning ............................................................................................................ 28 Testing...
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