Heater Break Alarm And Scr Short Circuit; Hb Alarm Contact (Only With The Hb Option) - CD Automation CD3000S2PH User Manual

CD3000S
2PH from 10A to 90A
7

Heater break alarm and SCR short circuit

The Heater Break circuit to work properly must have at least an input of 25% of the nominal
current.
H.B. circuit read load current via a current transformer 25-50/0.05 or 100/0.05 depending on thyristor size.
Minimum current is 30% of the current transformer size's. If load current is below this value make two turns or
more around current transformer. H.B. circuit also diagnoses fuse failure.

7.1 HB alarm contact (only with the HB option)

CD3000S is supplied with Heater Break (HB) alarm contacts normally opened (NO):
• In normal conditions (without alarm) and with auxiliary power supply, the contact to the terminals has opened
(relay coil energized).
• In alarm condition or without auxiliary power supply the contact to the terminals is closed (relay coil not
energized).
If you wish to change the alarm contact put the jumper as shown:
35A-90A
K1
K2
G2
JP4
G1
K1
K2
G2
- +
JP3
JP6
22
JP5
JP1
+
A B C
JP1
JP2
User's manual
Only with HB option
Type JP1
NO (standard) A-B
NC B-C