17
Ordering numbers
SPAD 330 C, differential relay
RS 621 001-AA, CA, DA, FA
The last two letters of the ordering number indicate the rated frequency f
n
and the auxiliary voltage range U
aux
of the relay as follows:
AA equals f
n
=50 Hz and U
aux
= 80…265 V ac/dc
CA equals f
n
=50 Hz and U
aux
= 18…80 V dc
DA equals f
n
=60 Hz and U
aux
= 80…265 V ac/dc
FA equals f
n
=60 Hz and U
aux
= 18…80 V dc
Information
required
with order
Example:
1. Type designation and title of
SPAD 330 C, biased differential relay
2. Rated frequency
f
n
= 50 Hz
3. Ordering number
RS 621 001-AA
4. Auxiliary voltage
U
aux
= 110 V dc
5. Accessories
2 raising frames type SPA-ZX301
2 bus interface modules SPA-ZC12 BB
2 fibre-optic cables SPA-ZF AA10
1 fibre-optic cable SPA-ZF AA5
6. Special requirements
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