Document No: LT0122

F3200 Installation & Programming Manual

 

Configuring a FIP

5.3.5BATTERY TEST RESISTORS

The standard battery test resistor is suitable for a battery of capacity of up to 6.5AHr.

For larger batteries, additional resistors must be fitted, either directly to the MAF/PSU pcb (in R34 and/or between Battery Test tabs), or within the FIP and wired to the Battery test tabs.

Where the additional resistors are carrying a current of greater than 0.7A, a 24Vdc relay must be fitted to switch the load as shown in Fig 5.3.1. (Note the diode polarity, the end is marked on the case).

Battery test current is calculated as 0.1C at 25V where C is the battery ampere hours. E.g. 1A test current is required for a 10Ahr battery.

The standard battery test current of 0.65A includes FIP quiescent current. Table 5.3.1 shows the additional battery test resistors that must be fitted for various battery sizes. It is calculated using the quiescent current of a base FP0550 (or FP0551). In general, a FIP requiring larger batteries will have a higher quiescent current than that of a base FP0550, and so a smaller additional test current than that shown could be used.

Because the battery test runs only for 1 minute and is then disabled for greater than 1 minute, resistors may be used at full power rating, or even slightly greater. (Resistors of power ratings greater than that shown may be used).

 

Total

Additional

 

Relay

 

Battery

Test

Test

Additional

Resistor

Rating

Capacity

Current

Current

Resistance

Combination

Amps

Ahr

A

A

Ohms

Ohms/Watts

(at 24Vdc)

6.5

.65

-

-

-

 

-

10

1.0

.35

71.4

68E

10W

-

17

1.7

1.05

23.8

22E

20W

2

 

 

 

 

OR 27E 20W//

 

 

 

 

 

180E 5W

 

28

2.8

2.15

11.6

12E

50W//

2.5

 

 

 

 

330E 2W

 

 

 

 

 

OR 10E 50W

 

33

3.3

2.65

9.43

10E

50W//

3

 

 

 

 

150E 5W

 

40

4.0

3.35

7.46

15E

50W//

4

 

 

 

 

15E

50W

 

 

 

 

 

OR 10E 50W//

 

 

 

 

 

27E

20W

 

60

6.0

5.35

4.67

4E7

100W

6

 

 

 

 

OR 10E 50W//

 

 

 

 

 

10E

50W//

 

Note : // means "wired in parallel with".

 

68E

10W

 

 

 

 

 

TABLE 5.3.1

BATTERY TEST RESISTORS

Issue 2.7

5 July 2001

Page 5-7

Page 61
Image 61
Tyco F3200 manual Battery Test Resistors

F3200 specifications

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