Kussmaul 091-134A User Manual

FILE: IM_091-134-025_Rev_A

INSTRUCTION MANUAL

DATE: 11-26-03

AUTO INTERLOCK IIA

AUTOMATIC TRANSFER AND

BATTERY CHARGER CIRCUIT

ISOLATION SWITCH

MODEL

091-134-025

3 YEAR WARRANTY

KUSSMAUL ELECTRONICS CO., INC.

170 CHERRY AVE., WEST SAYVILLE, N.Y. 11796-1221

TEL: in NY 631-567-0314 TOLL FREE: 800-346-0857 FAX: [phone]

INTRODUCTION:

The Model 091-134-025 AUT O INTERLOCK IIA is an automatic power transf er relay specifically
designed to isolate various battery charging systems such that
actively charging a battery at any time. Referring to Figure 1 the Model 091-134-025 AUTO
INTERLOCK IIA can accomodate three (3) battery charging system inputs and outputs as follows:

INPUTS

1. Conventional 115VAC High Powered or multi-step external battery charger (>10A) via
ShorePo wer 115VAC Input to High Po w er Charger.

2. 115VAC Generator equipped with DC output Alternator connected to common battery bank.

3. Low Power DC battery charger (<3A), i.e. Solar Panel, Float Voltage Charger.
OUTPUTS

1. 115VAC to conv entional high po wer charger.

2. Isolated DC battery charge circuit for Low Power Charger.

ONLY one (1) charging system is

THEORY OF OPERATION:

The Model 091-134-025 AUTO INTERLOCK IIA senses the Generator 115VAC output and the
status of a 115VAC connected “ShorePower” and configures the battery charging isolation as
follows.

! With neither ShorePower connected nor the Generator running the AUTO INTERLOCK IIA
connects the Low Power Charger (LPC) DC circuit to the battery.
! With ShorePo wer connected the A UT O INTERLOCK IIA tr ansf ers the f acility supplied power
to the AC input of a High Power Charger (HPC) and opens the DC circuit of the LPC to the
battery.
! With the Generator running the AU TO INTERLOCK IIA senses the gener ator 115V AC output
and disables the 115VAC ShorePow er input (whether present or not) to the HPC and opens
the DC circuit of the LPC to the battery.

The AUT O INTERLOCK IIA provides three (3) indicators f or “State Indication” in accordance with
the following T ab le

Battery Charging Circuit State and Indication Table

Generator Shorepower Battery Charge Circuit State Indication

OFF OFF LP C ALL OFF
OFF ON H P C Main & Output=ON, A uxiliary=OFF
ON OFF Generator Auxiliary=ON, Main & Output=OFF
ON ON Generator Main & Auxiliary=ON, Output=OFF