T4400.0110

T4400.0110 Datasheet

T4400 Load Sharer

Part	Datasheet
T4400.0110	T4400.0110 (pdf)

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T4400 Load Sharer • Automatic load sharing with voltage based speed control • Adaptable to most speed controllers • 2-wire communication with other T4400 Load Sharers • Built-in frequency control • Load / unload facility with C/B state and unload signal • Cost effective and highly reliable compact design • 50 hours burn-in before final test • Operating temperature range: -20°C to +70°C • Flame retardant enclosure • DIN rail or screw mounting Application The T4400 Load Sharer provides load sharing and frequency control for parallel running generators. The load sharing is proportional, meaning that the generators will be loaded equally compared to their individual capacity. The T4400 works in connection with most electronic speed controllers. The load on each generator is compared with the load on the other generators and corrected until balance is obtained. Load sharing is necessary after in order to re-establish load balance and to obtain long term stability of load and system frequency. The T4400 calculates I x cos f, ting the active load. The load on each generator is compared with the load on the other generators and calculated into a control signal that is connected to the electronic speed controller for regulating the load with optimal speed and stability. The T4400 includes a built-in frequency control and an integration function. These two features provide a very high overall stability and compensate for any drift within the speed controller. A soft load / unload function is also provided. When activated, the T4400 will slowly increase or decrease speed to transfer load to or from the generator. A built-in relay can automatically trip the circuit breaker when the unload is completed. Fig. 1 shows how to connect to most Woodward and Heinzmann speed For connection to other makes please refer to the section on the following page. When applied with the B9300 Power Reference Unit, one or several generators can be operated in parallel with the grid utility . Together with the T4000 Auto nizer, the T4400 provides the optimal solution for generator control, both in land and marine-based applications. The T4900 VAr-Load Sharer can be used as a supplement. The combination of the T4400 and the T4900 will provide complete load sharing of both active load and reactive load. Soft load or unload Sync. T4400 Next T4400 Function The input to the T4400 is the voltage and current, from which the active load and frequency are determined. Fig. Application diagram for T4400 and speed controller with -5V to +5V DC input. Supply voltage / current The supply voltage from L1 and L2 is connected to terminals 1 and 3 or 2 and 3, depending on the system voltage. The measuring current from L3 is to terminals 5 and 6 with 5 referring to the generator see the diagram on page The current measurement must be taken from the same phase on all generators. The current is measured in the phase that is not supplying the unit. It is to ensure that the phase is correct. This relation between the connections of voltage and current must be correct in order to achieve a correct load ent. It can be checked on terminal 11 TEST OUT , where an input of nominal current 1A or 5A and power factor gives +6V for correct connection. Ramp function The T4400 includes a ramp function. With this function activated, the unit will smoothly take over the load up to load balance. In order to activate this function, 7 UNLOAD and 32 should initially be bridged and so should 31 C/B and 32 for example with an aux. contact of the circuit Now the ramp function can be activated by opening the connection between terminals 7 UNLOAD and Common reference Terminal 12 COM. is the common reference for terminals 8 to Unload facility The unload facility will smoothly unload the generator. This facility works like an inverted ramp function. If activated, the load on the generator will be reduced and maintained at a low level. In order to activate, terminals 31 C/B and 32 should initially be bridged. The unload function is then activated by connecting terminal 7 UNLOAD to Unload trip When the load passes below 5% load, a trip signal is provided as a normally open NO contact on terminal 20-21 and a normally closed NC contact on This trip signal can be used to trip the circuit breaker. Frequency control The electronic speed controller will control the frequency of the generator. However, the frequency control of some speed controllers will drift with time. In order to compensate for this, the T4400 includes frequency control. The system frequency can be set to 60Hz with terminals 29 and 30 bridged or 50Hz with these terminals open. Further adjustment of the frequency is possible using the potentiometer DIFF. FREQ. on the front panel. Connecting terminal 8 FREQ. OUT to 12 will disable the frequency control. This is used when running parallel with the grid, where the frequency is fixed by the grid. Input from synchronizer Between terminals 9 FREQ. IN and 12 the SELCO T4000 Auto Synchronizer or most other synchronizer makes can be connected. The synchronizer will then give the synchronizing output through the T4400. This signal is not affected by the output adjustments on the T4400. External power measurement Between terminals 10 WATT IN and 12 a negative voltage 0 to -1V DC from a watt converter can be connected to substitute the internal load measuring circuit. In this case no input on terminals 5 and 6 is needed. Most standard signals can be adapted with external resistors. 0-10V series resistor 510kW 0-5mA parallel resistor 200W Communication between load sharers For communication between the load sharers all terminals 12 COM. are interconnected, as well as all terminals 13 Output to the speed controller Output to the electronic speed controller is taken from terminals 15 REF. and 16 + with terminal 15 as reference. If an

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T4400 Load Sharer
• Automatic load sharing with voltage based speed control
• Adaptable to most speed controllers
• 2-wire communication with other

T4400 Load Sharers
• Built-in frequency control
• Load / unload facility with

C/B state and unload signal
• Cost effective and highly reliable
compact design
• 50 hours burn-in before final test
• Operating temperature range:
-20°C to +70°C
• Flame retardant enclosure
• DIN rail or screw mounting

Application The T4400 Load Sharer provides load sharing and frequency control for parallel running generators. The load sharing is proportional, meaning that the generators will be loaded equally compared to their individual capacity.

The T4400 works in connection with most electronic speed controllers.

The load on each generator is compared with the load on the other generators and corrected until balance is obtained.

Load sharing is necessary after in order to re-establish load balance and to obtain long term stability of load and system frequency.

The T4400 calculates I x cos f, ting the active load. The load on each generator is compared with the load on the other generators and calculated into a control signal that is connected to the electronic speed controller for regulating the load with optimal speed and stability.

The T4400 includes a built-in frequency control and an integration function. These two features provide a very high overall stability and compensate for any drift within the speed controller.

A soft load / unload function is also provided. When activated, the T4400 will
slowly increase or decrease speed to transfer load to or from the generator. A built-in relay can automatically trip the circuit breaker when the unload is completed.

Fig. 1 shows how to connect to most Woodward and Heinzmann speed For connection to other makes please refer to the section on the following page.

When applied with the B9300 Power Reference Unit, one or several generators can be operated in parallel with the grid utility .

Together with the T4000 Auto nizer, the T4400 provides the optimal solution for generator control, both in land and marine-based applications. The T4900 VAr-Load Sharer can be used as a supplement. The combination of the T4400 and the T4900 will provide complete load sharing of both active load and reactive load.

Soft load or unload

Sync. T4400

Next

T4400

Function The input to the T4400 is the voltage and current, from which the active load and frequency are determined.

Fig. Application diagram for T4400 and speed controller with -5V to +5V DC input.

Supply voltage / current The supply voltage from L1 and L2 is connected to terminals 1 and 3 or 2 and 3, depending on the system voltage.

The measuring current from L3 is to terminals 5 and 6 with 5 referring to the generator see the diagram on page The current measurement must be taken from the same phase on all generators.

The current is measured in the phase that is not supplying the unit. It is to ensure that the phase is correct.

This relation between the connections of voltage and current must be correct in order to achieve a correct load ent. It can be checked on terminal 11 TEST OUT , where an input of nominal current 1A or 5A and power factor gives +6V for correct connection.

Ramp function The T4400 includes a ramp function. With this function activated, the unit will smoothly take over the load up to load balance.

In order to activate this function, 7 UNLOAD and 32 should initially be bridged and so should 31 C/B and 32 for example with an aux. contact of the circuit Now the ramp function can be activated by opening the connection between terminals 7 UNLOAD and

Common reference Terminal 12 COM. is the common reference for terminals 8 to

Unload facility The unload facility will smoothly unload the generator. This facility works like an inverted ramp function. If activated, the load on the generator will be reduced and maintained at a low level.

In order to activate, terminals 31 C/B and 32 should initially be bridged. The unload function is then activated by connecting terminal 7 UNLOAD to

Unload trip When the load passes below 5% load, a trip signal is provided as a normally open NO contact on terminal 20-21 and a normally closed NC contact on This trip signal can be used to trip the circuit breaker.

Frequency control The electronic speed controller will control the frequency of the generator. However, the frequency control of some speed controllers will drift with time. In order to compensate for this, the T4400 includes frequency control.

The system frequency can be set to 60Hz with terminals 29 and 30 bridged or 50Hz with these terminals open. Further adjustment of the frequency is possible using the potentiometer DIFF. FREQ. on the front panel.

Connecting terminal 8 FREQ. OUT to 12 will disable the frequency control. This is used when running parallel with the grid, where the frequency is fixed by the grid.

Input from synchronizer Between terminals 9 FREQ. IN and 12 the SELCO T4000 Auto Synchronizer or most other synchronizer makes can be connected. The synchronizer will then give the synchronizing output through the T4400. This signal is not affected by the output adjustments on the T4400.

External power measurement Between terminals 10 WATT IN and 12 a negative voltage 0 to -1V DC from a watt converter can be connected to substitute the internal load measuring circuit. In this case no input on terminals 5 and 6 is needed. Most standard signals can be adapted with external resistors. 0-10V series resistor 510kW 0-5mA parallel resistor 200W

Communication between load sharers For communication between the load sharers all terminals 12 COM. are interconnected, as well as all terminals 13

Output to the speed controller Output to the electronic speed controller is taken from terminals 15 REF. and 16 + with terminal 15 as reference. If an

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Datasheet ID: T4400.0110 646564