TORKEL 820

Battery Load Unit

TORKEL 820
Battery Load Unit
▪▪Lightweight

▪▪Expandable system

▪▪Rugged and reliable for field use

▪▪Test
without disconnecting the battery
from the equipment it serves

Description
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 TORKEL™820 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 or c) a
certain amount of capacity has been dissipated.
 TORKEL 820
Battery Load Unit

Features and benefits Application example

1. Display Testing can be carried out without disconnecting the battery
2. External measurement input used to measure current in an from the equipment it serves. Via a DC clamp-on ammeter,
external path by means of a clamp-on ammeter or a current TORKEL 820 measures total battery current while regulating it at
shunt. a constant level.
3. Keys for operation and settings. The TORKEL 820 is connected to battery, the current and
4. Alarm output equipped with a relay contact for triggering an the voltage alarm level are set. After starting the discharge
external alarm device. TORKEL 820 keeps the current constant at the preset level.
5. Start/Stop input used for starting and stopping discharging When the voltage drops to a level slightly above the final voltage,
from an external device. Galvanically isolated. TORKEL 820 issues an alarm. If the voltage drops so low that
6. Indicating lamps. Operating, Stop/Limit there is a risk for deep discharging the battery, TORKEL shuts
7. TXL output used for control of TXL Extra Loads. Galvani- down the test. The total voltage curve and the readings taken at
cally isolated. the end of the test are stored in TORKEL 820. Later, using the
8. Serial port used for connection to a PC or other controlling TORKEL Win program, you can transfer these readings to your
equipment. computer for storage, printout or export. If your PC is connected
to TORKEL 820 during the test, TORKEL Win builds up a
9. Voltage controlled circuit breaker that connects / discon-
voltage curve on the screen in real time and displays the current,
nects the loading circuits in TORKEL from the battery. voltage and capacity readings. You can also control the test using
10. Positive current connection for battery being tested. TORKEL Win.
11. Input for sensing voltage at the battery terminals.
12. Negative current connection for battery being tested.
13. Mains connector, equipped with ON/OFF switch.

1 2 3 4 5 6 7 8

9 10 11 12 13

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 TORKEL 820
Battery Load Unit

Specifications TORKEL 820 Load section

Specifications are valid at nominal input voltage and an ambient Battery voltage 10 – 60 V DC
temperature of +25°C, (77°F). Specifications are subject to change Max. current 270 A
without notice.
Max. power 15 kW
Environment Load patterns Constant current, constant power, con-
Application field The instrument is intended for use in stant resistance, current or power profile
high-voltage substations and industrial Current setting 0-270.0 A (2999.9 A) 1)
environments.
Power setting 0-15.00 kW (299.99 kW) 1)
Temperature
Resistance setting 0.1-2999.8 Ω
Operating 0°C to +40°C (32°F to +104°F)
Battery voltage range 2 ranges, selected automatically at start
Storage & transport -40°C to +70°C (-40°F to +158°F)
of test
Humidity 5% – 95% RH, non-condensing Stabilization (For ±(0.5% of reading + 0.5 A)
internal current
CE-marking measurement)
LVD 2006/95/EC Battery Highest permissible Resistor ele-
EMC 2004/108/EC voltage current ment (Nomi-
nal values)
General
Mains voltage 100 – 240 V AC, 50 / 60 Hz Range 1 10 – 27.6 270 A 0.069 Ω
V
Power consumption 150 W (max)
Range 2 10 – 55.2 270 A 0.138 Ω
Protection Thermal cut-outs, automatic overload
V
protection
1) Maximum value for a system with more than one load unit
Dimensions
Instrument 210 x 353 x 700 mm Inputs, maximal values
(8.3” x 13.9” x 27.6”) EXTERNAL 1 V DC, 300 V DC to ground. Current
CURRENT shunt should be connected to the negative
Transport case 265 x 460 x 750 mm
MEASUREMENT side of the battery
(10.4” x 18.1” x 29.5”) EXTERNAL
Weight 22.3 kg (49.2 lbs) CURRENT
40.4 kg (89.1 lbs) with accessories and START / STOP Closing / opening contact
transport case Closing and then opening the contact will
Display LCD start / stop Torkel. It is not possible to keep
Available languages English, French, German, Spanish, Swedish the contacts in closed position.
Measurement section Delay until start 200 – 300 ms
Current measurement Stop delay 100 – 200 ms
Display range 0.0 – 2999 A Battery 60 V DC, 500 V DC to ground
Basic inaccuracy ±(0.5% of reading +0.2 A) VOLTAGE SENSE 60 V DC, 500 V DC to ground
Resolution 0.1 A SERIAL < 15 V
ALARM 250 V DC 0.28 A
Internal current measurement
28 V DC 8 A
Range 0 – 270 A 250 V AC 8 A
Input for clamp-on ammeter
Outputs, maximal values
Range 0–1V START / STOP 5 V, 6 mA
mV/A-ratio Software settable, 0.3 to 19.9 mV/A TXL Relay contact
Input impedance >1 MΩ SERIAL < 15 V
Voltage measurement ALARM Relay contact
Display range 0.0 – 60 V
Discharging capacity, examples
Basic inaccuracy ±(0.5% of reading +0.1 V)
12 V battery (6 cells) 2)
Resolution 0.1 V
Final voltage Constant current Constant power
Time measurement 1.80 V / cell (10.8 V) 0 – 121 A 0 – 1.31 kW
Basic inaccuracy ±0.1% of reading ±1 digit 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)
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)
1.80 V / cell (43.2 V) 0 – 270 A 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

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 TORKEL 820
Battery Load Unit

Optional accessories Application examples with TORKEL/TXL sys-

tems
TXL TORKEL and TXL can be combined into systems to match up
These resistive extra loads do not perform any regulating func- for different battery capacities. Here is an example.
tions. They are designed for use together with TORKEL Battery
Load Units. Their purpose is to provide higher load currents
for use in constant current or constant power tests. Together,
TORKEL and the TXL Extra Loads form a system that can
discharge batteries with currents of up to several kA. TXL Extra
Loads are connected directly to the battery, and TORKEL mea-
sures the total current using a clamp-on ammeter.
TXL Extra Loads are shut down automatically when TORKEL is
stopped.

TORKEL and the extra load TXL

TORKEL / TXL - systems examples
Max. constant current Number of Number of
(A) TORKEL-units TXL-units
TORKEL 820 + TXL830, 12 V battery (6 cells)1)
234 1 1
TXL850 571 1 4
918 2 6
TORKEL Win PC software TORKEL 820 + TXL830, 24 V battery (12 cells)1)
„„Shows the complete voltage curve 495 1 1
„„Last
1170 1 4
recorded time, voltage, current and discharged
1890 2 6
capacity
TORKEL 820 + TXL850, 48 V battery (24 cells)1)
„„Scroll-window for all recorded values
499 1 1
„„Remote control of TORKEL 1189 1 4
„„Report functions 1918 2 6
1) Discharge from 2.15 V to 1.8 V per cell

TORKEL Win showing the total voltage graph

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 TORKEL 820
Battery Load Unit

Specifications TXL830 / 850
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.
Temperature
Operating 0°C to +40°C (32°F to +104°F)
Storage & transport -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 Cable set, GA-00554
Mains voltage 100 – 240 V AC, 50 / 60 Hz
Power consumption 75 W (max)
Protection Thermal cut-outs, automatic over-
load protection
Dimensions
Instrument 210 x 353 x 600 mm
(8.3” x 13.9” x 23.6”)
Transport case 265 x 460 x 750 mm
(10.4” x 18.1” x 29.5”)
Weight 13 kg (28.7 lbs)
21.4 kg (47.2 lbs) with transport case
Cable sets
for TXL830 / 850 2 x 3 m (9.8 ft), 70 mm2, 270 A, with
cable lug. Max. 100 V. 5 kg (11 lbs)
Ordering information
Load section Item Art. No.
TXL830 TXL850 TORKEL 820
Max. voltage (DC) 28 V 56 V Complete with:
Max. current 300 A 300 A Cable set GA-00554
Max. power 8.3 kW 16.4 kW Transport case GD-00054 BS-49092

Internal resistance, 3-position selector Optional

Position 1 TXL830 TXL850 TORKEL Win PC software BS-8208X
Current 0.275 Ω 0.55 Ω Extra loads
100 A at 27.6 V (12 x 2.3 V) at 55.2 V (24 x 2.3 V) TXL830 BS-59093
78.5 A at 21.6 V (12 x 1.8 V) at 43.2 V (24 x 1.8 V)
TXL850 BS-59095
50.1 A – –
39.2 A – – Cable sets
Position 2 TXL830 TXL850 Cable set for TXL830 and TXL850
Current 0.138 Ω 0.275 Ω 2 x 3 m, 70 mm2, with cable lug. Max 100 V 270 A.
200 A at 27.6 V at 55.2 V (24 x 2.3 V) Weight: 5.0 kg (11 lbs) GA-00554
156 A at 21.6 V 43.2 V (24 x 1.8 V)– Sensing lead set
Position 3 TXL830 TXL850 Cable set for measuring voltage at battery terminals.
Current 0.092 Ω 0.184 Ω 2 x 5 m (16.4 ft) GA-00210
300 A at 27.6 V at 55.2 V (24 x 2.3 V) Clamp-on ammeters
235 A at 21.6 V 43.2 A (24 x 1.8 V) DC clamp-on ammeter, 200 A
100 A – – To measure current in circuit outside TORKEL XA-12792
78.4 A – –
DC clamp-on ammeter, 1000 A
To measure current in circuit outside TORKEL XA-12790

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