supply of shunting mode operation switch (hsm)shunting mode operation switch (hsm),shunting mode operation switch (hsm) similar to zcpa program switch as per clw spec. no.:clw/es/s-1/za, model no.: 250-2yw-005w of m/s. siemens make. note:-1. hsm switch programme should be all contact closed at zero position & open at 1 position as per modification 0492 circuit diagram. 2. on switch plate hsm name & 0, 1 marking should be written. 3. item should be purchased from clw approved source or their authorised dealer. 4. one sample should be got approved before the bulk supply. [ warranty period: 30 months after the date of delivery ]