Littelfuse Selco B9300 Power Reference Unit User Manual download pdf

B9300 Power Reference Unit

POWER REF. UNIT

B9300

100

• Setting of generator capacity via

SELCO load sharers

• Adjustable from 0 to 100%

• DC output (0 - 1V DC, ±1V DC,

0 - 3V DC or 0 - 5V DC)

• Knob for manual control

• Screw lock for knob

• 50 hours burn-in before test

• Ambient temperature range:

-20°C to +70°C

• Flush mounted unit

Application

The B9300 Power Reference Unit is

applied for setting the capacity to be

provided by the engine driven gene-

rator(s) when the generators are

operated in parallel with a grid (utility)

or a shaft generator.

The B9300 is used as a complementary

unit to SELCO’s range of load sharers

(Load Sharer type T4300, T4400 and

T4800).

Function

The load sharer will adjust the power of

an engine driven generator according to

the setting of the knob placed on the

front panel of the Power Reference

Unit. The setting is 0 - 10 (equivalent to

0 - 100 %).

A ﬁnger screw is provided for locking

the dial.

The same Power Reference Unit can

also be connected to several load

sharers where a multi engine installa-

tion is operating in parallel with a grid

supply.

The output of the B9300 Power

Reference Unit (terminals 5 and 3) is

connected to the parallel lines of the

load sharer(s) (terminals 12 and 13).

The connection of terminal 5 of the

B9300 Power Reference Unit and

terminal 13 on the SELCO T4800 Load

Sharer will disable the frequency

control function in the load sharer. This

is used when running parallel to the

grid (utility) or other frequency

determining power sources.

Please note that the dead band zone in

the T4800 Load Sharer will be reduced

to half of its original setting. If instability

occurs, the dead band zone should be

increased by increasing the STABILITY

setting on the T4800.

The B9300 Power Reference Unit is for

ﬂush mounting and it has standard

instrument dimensions 96 x 96 x 80mm

(H x W x D).

Option

In order to obtain remote setting of the

power reference function, a combina-

tion of Selco’s E7800 Motorized Poten-

tiometer Type and B9300 Power

Reference Unit is available. The unit is

speciﬁed E7800-9x. For details, please

refer to the data sheet for the E7800

Motorized Potentiometer. This data

sheet can be downloaded from our web

site www.selco.com

Example of setting:

Generator rating: 695A at PF 0.8

Active current: 695 x 0.8 = 556A

Current transformer: 800/5

Maximum on dial: 10

Full load on dial: 10 x 556/800 = 6.95

(69.5%)

MAINS-SWITCH

POWER

REFERENCE

B9300-XX-14

LOAD SHARER

T4400

LOAD SHARER

T4400

BUS

GRID

MAINS-SWITCH

AUT./MAN.

POWER

REFERENCE

B9300-XX-10

MOTOR

SUPPLY

DECR.INCR.

GEN.

LOAD SHARER

T4800

AUT./MAN.

LOAD SHARER

T4800

MOTOR

SUPPLY

DECR.INCR.

GEN.

BUS

GRID

Fig. 1. Application Diagram. B9300 with T4400. Fig. 2. Application Diagram. B9300 with T4800.

1 2

Summary of Contents

Page 1 - B9300 Power Reference Unit

B9300 Power Reference UnitPOWER REF. UNITB9300ON100• Setting of generator capacity via SELCO load sharers• Adjustable from 0 to 100%• DC output (0 - 1

Page 2 - Speciﬁcations

B9395-72 ESpeciﬁcationsB9300 Power Reference UnitMax. voltage 480VVoltage range 90 - 120%Consumption 2VA at UN DC output 0 - 1V DC, ±1V DC, 0 - 3

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Littelfuse Selco B9300 Power Reference Unit User Manual

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