Construction - GE ALPS Instruction Manual

3 HARDWARE DESCRIPTION
3 HARDWARE DESCRIPTION 3.1 CASE ASSEMBLY
Power down the relay by turning off the front panel power switch and disconnecting power from the rear
connector (A1–A17) before disassembling the unit. Failure to do so can permanently damage the relay.
CAUTION
The relay case is constructed from an aluminum alloy. It consists of a main frame with mounting brackets and a front, top
and rear cover. The relay may be mounted either vertically or horizontally. The mounting ears may be placed in 6 positions
(see Figure 3–2: FRONT AND REAR VIEW).
The front cover attaches with four thumb screws. A hole in each of the screws permits a tamper proof installation when a
sealing wire is passed through two or four thumbscrews. The Target Reset / Metering button is accessible via a hole in the
front cover. place by restraining screws on the front of the module trays.
The rear of the case supports terminal blocks for external connections to the relay. The printed circuit board modules are
mounted horizontally inside the case and connected via a bus card behind the front panel. The boards also have rear edge
connectors that electrically connect with the rear terminal blocks and are held firmly in place by restraining screws on the
front of the module trays.
Each board is mounted on an aluminum plate. Proper alignment of the boards to their sockets is maintained by card
guides. The aluminum plate supporting each board fits into these guides. The magnetics module, due to its weight, is rigidly
mounted to the bottom of the case.
An outline drawing is shown in Figure 3–1: DIMENSIONS above, presenting the front and rear views of the horizontal
mount ALPS. The figure provides a panel cutout and drill pattern for mounting the ALPS.
GE Power Management
Figure 3–1: DIMENSIONS
ALPS Advanced Line Protection System
3.1 CASE ASSEMBLY

3.1.1 CONSTRUCTION

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