Siemens 7SA511 manual Storing the Relay, Preparing the Relay for Installation

7SA511 Line Protection Relay Installation

4.2 Storing the Relay

Store the relay in a dry, clean room. The temperature range for storage is -13°F to +131°F (-25°C to +55°C). Refer to the technical specifications in Reference D of this manual for additional storage information.

If the relay is de-energized and stored for an extended time period, proper voltage should be applied to the power input for one or two days prior to placing the relay into service again.

4.3 Preparing the Relay for Installation

A battery is supplied separately in the plastic bag attached to the 7SA511 relay at delivery. This battery is required for the internal clock and calendar to maintain the correct date and time should a power supply failure occur. The battery is also used to maintain the memory containing stored fault data. This battery should be installed in the relay just prior to putting the relay in service. You must remove the from cover from the relay and remove the relay’s basic module from the housing to install the battery. The following sections provide detail steps for performing these procedures.

CAUTION

Electrostatic Discharge

Possible equipment damage.

The relay module contains CMOS circuits. The module must never be withdrawn from or inserted into the housing with power connected.

Electrostatic discharges into or around the uninstalled relay or any of its components must be avoided.

The use of grounding straps or touching a grounded metal surface before handling the uninstalled relay is essential.

4-4 July 27, 1995