Eurotherm TE200S, Руководство пользователя

Страница: 33 / 42

4-3 TE200S User manual
CHECKING THE CHARACTERISTICS
Load current
The maximum load current must be less than or equal to the value of the nominal current of
the SSR, taking into account the load and power supply variations.
For the total power (P) of a three-phase load and for the line-to-line voltage VL, the current is:
P
I = ----------------
√
3 x VL
In order to take supply voltage and load value tolerances into account, allow a minimum 20%
safety margin between the result of the calculation given above and the nominal current of the
SSR.
Warning !
The nominal current of the SSR (I
N
) must be greater than or equal to 1.2 x I.
If three identical loads are configured in closed delta, the current of each phase of the SSR is
√
3 times greater than the current in each branch of the load.
Supply voltage
The nominal value of the TE200S voltage must be greater than or equal to the line-to-line
voltage of the supply used.
COMMISIONING PROCEDURE
!