Where Should You Use the M–0001 Battery Transient Suppressor?

Use on the equipment side of battery fuses.

Why? A lightning stroke may last as long as a second. If the fuse blows early in the

stroke, no suppressor will help if it is on the wrong side of the fuse.

Use one suppressor for each piece of equipment to be protected.

Why? A number of suppressors can drain off the transient energy into many paths,

thereby reducing the possibility of a fuse blowing. Many suppressors cost far less

than the damage that can be caused by a single lightning stroke.

Even so, a single suppressor was installed many years ago at a substation where

a direct lightning stroke occurred. Although the suppressor was damaged, it

protected a costly fault recorder.

Use within a few feet of the equipment to be protected.

Why? Lightning sets up high frequency resonant voltages in the battery leads.

The suppressor will clamp the voltages near the equipment.

Use in place of a capacitor-type transient suppression from battery leads to ground.

Why? Control batteries are ungrounded to permit a single ground to be detected

and an alarm given without causing a relay to trip. Capacitors connected to ground

from the battery leads will discharge through auxiliary relays and can cause a breaker

to trip on a single momentary ground.