70 Series Battery Power System
Rack Mounted
Factory-Packaged, Non-Stop DC Power for Telecom.
Battery Power System Highlights
SENS 70 Series Battery Power System (BPS) is the ideal DC source
with battery backup for microwave and micro-cellular network repeaters. The
entire BPS shares a 19" or 23" rack with the equipment being
powered, saving space and money.
SENS BPS is flexible. Additional charger and/or battery capacity
can easily be added to systems already in operation.
SENS BPS offers three DC power distribution options: bulk
output, six-circuit distribution panel located in the charger, or 2
six-circuit distribution panels located in a separate distribution module.
The SENS 70 Series BPS is in use by major OEMs and
telecommunications authorities, and support voice and data transmissions on
nearly every continent.
Choose the Right Battery Power System
Use the following three steps to find the BPS part number:
1. Decide what DC voltage, charger redundancy and power
distribution options you require.
2. Then, refer to the System Tables to find the correct
system number at the intersection of your required ampere load and battery
backup time. If you require a 12-volt system, contact the factory for a
quotation.
3. Specify optional features as line items.
EXAMPLE:
You require a 24-volt system with redundant chargers and multiple
distribution circuits to supply 12 amps for 8 hours.
Decide first whether the separate distribution module is needed. Although
a separate module adds slightly to system size and cost, it offers the
greatest flexibility and system integrity. In this example, assume the
separate distribution module is needed.
- Refer to the 24 Volt System Tables.
- Find Table J (redundant chargers and separate distribution module).
- Find the intersection of 12 amps and 8 hours. The correct part number
is 742NF-22065-1A1(15A). This system requires 15 rack units (26.25" or 667
mm) and includes two 15 amp chargers, one battery pack with a 65 AH
battery and one distribution module.
Specifications
System Configuration
The BPS includes one or more rack-mounted modules, depending on system
power and battery reserve time. All modules plug together easily using
polarity-protected cables supplied with the system. Modules can be
distributed in separate racks, if required. 48, 24 and 12 volt systems
are available with single or redundant chargers, DC distribution
circuits and low-volt load disconnect. |
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Charger/Rectifier
The charger/rectifier is SENS CM (see CM data sheet), offering 8 or 15
ampere output. Typical recharge time is less than 12 hours with full load.
Battery Pack
- Batteries are located inside the charger or, in higher-powered
systems, in a separate 10.44" high battery pack.
- Ventilated, heavy-gauge, clear-anodized aluminum housing matches
charger housing.
- Two independently fused (30A) DC receptacles.
- Fits up to four 90 AH, 12 volt batteries.
- Batteries loaded on site. Factory loading of batteries optional
(requires heavy lifting on-site).
Battery
Sealed lead-acid batteries require only periodic load tests. Optional
charger temperature compensation is recommended for operation below 10
degrees C and above 30 degrees C. Battery sizes assume 20 C ambient
temperature and an end voltage of 1.75 volts per cell.
Distribution Unit/Low-Volt Load Disconnect
DC distribution and a low-volt load disconnect (LVD) units are available as
follows:
- Six-circuit distribution unit inside each charger, or
- 2 each six-circuit distribution units (DU) in a separate distribution
module. Each DU can be configured to operate from different DC buses, or
one common DC bus.
- 5A max per circuit, 20A max total. 5A GMT indicating type fuses
supplied.
- Alarms:
- "Fuse blown" indicated by LED and Form C contact.
- "Load disconnect imminent" indicated by LED.
- "Load disconnected" indicated by LED.
- LVD (prevents permanent battery damage) can be switched out of the
circuit if desired.
Connections & Cables
- Charger input: 10-foot (3 meters) AC cord with NEMA 5-15P molded plug.
- Module interconnection cables: #12 AWG plus ground, with
polarity-protected plugs.
- DC Output:
- Systems with single-circuit output: 10-foot (3 meters), #12 AWG cable
included.
- Systems with distribution: compression terminals accommodate up to #12
AWG.
Optional Features
- Charger ammeter and voltmeter (3.5", 89 mm) scale, 2% accuracy.
- Charger temperature compensation with remote sensor.
- Non-standard input voltage.
- Fungus proofing of circuit boards.
- Export packaging.
- Factory loading of batteries (meets seismic Zone 4 requirements).
- Adapter brackets for 23" rack mounting.
- Extended battery backup (greater than 8 hours).
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