Megger TXL850 Extra Load Unit for TORKEL Battery Test Systems

Megger TXL850 Overview

Telecom exchanges and data-centre UPS rooms often run 48 V strings of 24 lead-acid cells, and testing them at a short discharge rate can mean drawing more current than one TORKEL handles. The Megger TXL850 is the extra load Megger rates for that voltage class, up to 56 V DC. Think of it as a passive resistor bank: it sits beside the TORKEL, takes current straight from the battery and does no regulating. The TORKEL stays in charge of the test, holding the total battery current constant while reading it with a clamp-on probe, and shuts the TXL850 down via the TXL STOP line once it stops.

Megger’s TORKEL 900-series datasheet V12 specifies the TXL850 for up to 56 V DC, 300 A and 16.4 kW. Set its selector to 0.55, 0.275 or 0.184 Ω and a 24-cell bank at 55.2 V (2.3 V per cell) draws roughly 100, 200 or 300 A. More TXL units can be added for currents of up to several kA, and thermal cut-outs plus automatic overload protection look after the hardware. The unit runs from the mains and does no regulating of its own: the TORKEL holds the test current, reads the total through its clamp-on ammeter and switches the TXL850 off via its TXL STOP output when the test stops.

Megger TXL850 Key Features

• Extra load unit that boosts the current capacity of TORKEL battery test systems.
• Handles up to 56 V DC with up to 300 A (16.4 kW) of extra load.
• Multiple units linkable for combined currents of several kA.
• Connects directly to the battery; TORKEL measures via clamp-on ammeter.
• Automatic overload protection for safe operation.
• Mains powered and controlled entirely by the TORKEL system.

Megger TXL850 Applications

Jobs the Megger TXL850 is typically brought along for:

• 48 V telecom DC plant batteries of 24 cells, tested at the rate the battery maker’s table calls for.
• 48 V UPS and data-centre battery strings that cannot be taken out of service for long, so a shorter, higher-current test is preferred.
• Online tests with the battery still feeding its load, where the TORKEL’s clamp-on probe measures the total current.
• Larger 48 V systems: Megger’s TXL datasheet lists 909 A from two TORKEL 840/860 units and three TXL850s on a 24-cell bank.

What’s in the box with the Megger TXL850

• TXL850 extra load unit.
• Cable set GA-09550 (2 x 3 m, 70 mm²) for connecting to the battery.
• Two 2 m control leads and a transport case.
• Mains lead and user documentation.

Exact contents may vary by order; contact MME to confirm your configuration.

Why buy the Megger TXL850 from MME

Let MME know the bank voltage (for example 48 V), the number of cells, the discharge rate from the battery maker’s table and which TORKEL you own. We will size the number of TXL850 units and the selector setting, then send a quote.

Download the Megger TXL / TORKEL datasheet