Toshiba CTX28 Install Reserve Power, Typical Reserve Power Duration Estimate Number of Cabinets

Strata CTX670 Installation

Install Reserve Power

Step 6: Install Reserve Power

Two or four customer-supplied, 12VDC batteries (80 amp hours maximum) can be connected to the system as a power failure backup. In the event of a power failure, the system automatically switches over to battery power without any interruption to existing calls or other normal system functions.

Important! Batteries must be connected when normal AC power is available; they cannot be connected during an AC power failure situation.

The length of time reserve power operates depends on the system, size and number of batteries provided, and the system load. Typical reserve power duration estimates and battery specifications are estimated with the following considerations (see Table 4-4):

•Batteries have full charge at start of operation.

•Two or four batteries connected per Figure 4-18.

•Batteries are 12VDC, rated at 80 amp/hours each.

•System is operating at full load traffic with LCD phones.

•Batteries used for this test are gel-cell and maintenance-free. Reserve duration will vary depending upon battery type, age, and manufacturer. These figures should only be used as an estimate.

Table 4-4	Typical Reserve Power Duration Estimate
Number of Cabinets		1	2	3	4	5	6	7
Estimated operation time		12.0	6.0 hrs.	4.0 hrs.	3.0 hrs.	2.5 hrs.	2.0 hrs	1.8 hrs
Two-battery configuration		hrs.
Estimated operation time		24.0	12.0 hrs	8.0 hrs	6.0 hrs.	5.0 hrs.	4.0 hrs	3.5 hrs
Four-battery configuration		hrs.

WARNING! Some batteries can generate explosive gases. Therefore, ensure that batteries are located in a well-ventilated area.

Do not smoke near batteries.

Avoid creating any electrical sparks near batteries.

Use commercially available battery enclosures to reduce risk to nearby people and equipment.

The procedure for installing reserve power varies, depending on the number of cabinets in the system and the mounting method employed in installing the cabinets. The following text details reserve power battery installation requirements.

WARNING! Battery cables that exit the cabinet(s) are not UL listed because of possible incorrect installations. Have a licensed electrician install these cables.

Installation Strata CTX670

Strata CTX I&M 06/04 4-29