During a power outage, crucial telecommunication and radio equipment must be kept operating by batteries. However, the capacity of such batteries can drop
significantly for a number of reasons before their calculated life expectancy is reached. Battery capacity should thus be checked to prevent expensive downtime
in the event of a power failure.
The most reliable way to determine battery capacity is to conduct a discharge test. The TORKEL820 features a unique design that combines efficiency with
portability. Using TORKEL 820 you can discharge 24 and 48 V batteries at a current of 270 A, and 12 V batteries at 135 A. Moreover, two or more TORKEL 820 units
and/or extra load units, TXL, can be linked together if you need higher current. Discharging proceeds at constant current, constant power or constant resistance,
or in accordance with a pre-selected load profile.
The TORKEL 820 issues a warning and/or shuts down the test automatically when:
a) the voltage has dropped to a certain level
b) discharging has continued through a certain
time interval
c) a certain amount of capacity has been dissipated.
Specifications are valid at nominal input voltage and an ambient temperature of +25°C, (77°F). Specifications are subject to change without notice.
Environment
Application Field: The instrument is intended for use in high-voltage substations and industrial environments.
Operating Temperature: 0°C to +40°C (32°F to +104°F)
Storage & Transport Temperature: -40°C to +70°C (-40°F to +158°F)
Humidity: 5% – 95% RH, non-condensing
CE-marking
LVD: 2006/95/EC
EMC: 2004/108/EC
General
Mains Voltage: 100 – 240 V AC, 50 / 60 Hz
Power Consumption: 150W (max)
Protection: Thermal cut-outs, automatic overload protection
Instrument Dimensions: 210 x 353 x 700 mm (8.3” x 13.9” x 27.6”)
Transport Case: 265 x 460 x 750 mm (10.4” x 18.1” x 29.5”)
Weight: 22.3 kg (49.2 lbs), 40.4 kg (89.1 lbs) with accessories and transport case
Display: LCD
Available Languages: English, French, German, Spanish, Swedish
Measurement Section
Current Measurement
Display Range: 0.0 – 2999 A
Basic Inaccuracy: ±(0.5% of reading +0.2 A)
Resolution: 0.1 A
Internal Current Measurement
Range: 0 – 270 A
Input for clamp-on ammeter
Range: 0 – 1 V
mV/A-ratio: Software settable, 0.3 to 19.9 mV/A
Input Impedance: >1 MΩ
Voltage measurement
Display Range: 0.0 – 60 V
Basic Inaccuracy:
Resolution: 0.1V
Time Measurement
Basic Inaccuracy: ±0.1% of reading ±1 digit
Load Section
Battery Voltage: 10 - 60V DC
Max. Current 270 A
Max. Power 15 kW
Load Patterns Constant current, constant power, constant resistance, current or power profile
Current Setting 0-270.0 A (2999.9 A) 1)
Power Setting 0-15.00 kW (299.99 kW) 1)
Resistance Setting 0.1-2999.8Ω
Battery Voltage Range 2 ranges, selected automatically at start of test
Stabilization (For internal current measurement) ±(0.5% of reading + 0.5 A)
Battery Voltage
Range 1: 10 - 27.6V
Range 2: 10 - 55.2V
Highest Permissable Current
Range 1: 270A
Range 2: 270A
Resistor element (Nominal values)
Range 1: 0.069Ω
Range 2: 0.138Ω
1) Maximum value for a system with more than one load unit
Inputs, Maximal values
External Current Measurement: 1 V DC, 300 V DC to ground. Current shunt should be connected to the negative side of the battery
Start / Stop: Closing / opening contact
Closing and then opening the contact will Start / stop Torkel.
It is not possible to keep the contacts in closed position.
Delay Until Start 200 – 300 ms
Stop Delay 100 – 200 ms
Battery 60 V DC, 500 V DC to ground
Voltage Sense: 60 V DC, 500 V DC to ground
Serial: <15 V
Alarm: 250 V DC 0.28 A, 28 V DC 8 A, 250 V AC 8 A.
Outputs, Maximal Values
Start / Stop: 5 V, 6 mA
TXL: Relay contact
Serial: < 15 V
Alarm: Relay contact
Discharge Capacity Examples
|
Final voltage
|
Constant current
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Constant power
|
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12 V battery (6 cells) 2)
|
|
|
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1.80 V / cell (10.8 V)
|
0 – 121 A
|
0 – 1.31 kW
|
|
1.75 V / cell (10.5 V)
|
0 – 117 A
|
0 – 1.23 kW
|
|
1.67 V / cell (10.0 V
|
0 – 110 A
|
0 – 1.10 kW
|
|
24 V battery (12 cells) 2)
|
|
|
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1.80 V / cell (21.6 V)
|
0 – 270 A
|
0 – 5.8 kW
|
|
1.75 V / cell (21.0 V)
|
0 – 266 A
|
0 – 5.59 kW
|
|
1.60 V / cell (19.2 V)
|
0 – 241 A
|
0 – 4.63 kW
|
|
48 V battery (24 cells) 2)
|
|
|
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1.80 V / cell (43.2 V)
|
0 – 270 A
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0 – 11.6 kW
|
|
1.75 V / cell (42.0 V)
|
0 – 270 A
|
0 – 11.3 kW
|
|
1.60 V / cell (38.4 V)
|
0 – 259 A
|
0 – 9,9 kW
|
2) 2.15 V per cell when test starts