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SR100Hi Series - 100 W DC UPS
2. INTRODUCTION:
The SR100Hi power supply is designed to provide DC power to lead acid batteries for critical back up applications.
3. SR100Hi Series - SYSTEM BLOCK DIAGRAM
The No-Break ™DC - SR100Hi power supply is designed to provide DC power to lead acid batteries for critical back up appli-
cations.
AC MAINS
LED
POWER
OFF
OK LED
BATTERY
LED
SYSTEM
ON
OK LED
MAINS FAIL /
ALARM
POWER SUPPLY
OFF
FAIL ALARM
BATTERY
ALARM
SYSTEM
OFF
FAIL ALARM
4. OPERATION OF ELECTRONIC CIRCUIT BREAKER (ECB) FOR PROTECTION OF BATTERY CIRCUIT & BATTERY
Max. allowable
load amps
(x I rated)
Short circuit condition,
ECB trips within 2ms
7x I
for 300ms max.
rated
7
2.5
2ms
300ms
ECB automatically resets
The ECB will operate on overcurrent as above & is also activated for the low voltage disconnect function on mains fail (no input pow-
er). It will reset when input power is restored, or can be manually reset by briefly shorting the BAT- and LOAD- terminals together
when there is no input power.
POWER CONVERSION
OUTPUT VOLTAGE, CURRENT
LIMIT & BATTERY CHARGE
CURRENT CONTROL
BATTERY
BATTERY
MANAGEMENT
CURRENT
& ALARM
SENSE
CIRCUIT
Mains On
2.5 x I
until battery fully dis-
rated
charged
I
= 1x I
PSU
rated
ELECTRONIC
REVERSE
BREAKER
POLARITY
CIRCUIT
FUSE
NORMAL OPERATION
LOAD CURRENT < PSU MAX CURRENT
Max. allowable
load amps
(x I rated)
Short circuit condition,
ECB trips within 2ms
6x I
rated
6
1.5
2ms
300ms
Time
5
I
LOAD
LOAD +
LOAD -
I
CHARGE
BATTERY +
BATTERY TEMP.
SENSOR
BATTERY -
No Mains
for 300ms max.
1.5 x I
until LV disconnect
rated
operates
I
= 0
PSU
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Time
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