Cummins Generator Technologies Product Stamford AVR Selection

Selection

(AVR) AUTOMATIC VOLTAGE REGULATORS: SELECTION

Automatic Voltage Regulator (AVR) & Accessory Selection Tables.

The table below will indicate which AVR accessory is available for or incorporated in each range.


	MX321	MX341	AS440	SX460

BC16	N	N	N	S
BC18	N	N	N	S
UC22	O	O	O	S
UC27	O	O	O	S
HC4	O	O	S	N
HC5	O	O	S	N
HC6	S	N	N	N
P7	O	S	N	N
MV7	S	N	N	N
S = Standard \| O = Option \| N = Not available \| * Supplied loose


Sensing




Excitation Limiting	No	No	No	No	No	AVR Feature

Short Circuit Current Limiting	Yes	No	No	No	No	Additional CT Required

Under Frequency Protection	Yes	Yes	Yes	Yes	No	AVR Feature

Load Acceptance Feature UFRO	Yes	Yes	Yes	Yes	No	AVR Feature


Add on accessories
	MX 321	MX 341	SX 421	SX 440	SA 465	SX 460	Comments/Restrictions

Excitation circuit breaker	Yes	No	Yes	No	No	No	For isolation of the excitation system, standard on the SX421

RFI suppressor kit	Yes	Yes	Yes	Yes	Yes	Yes

Seperate voltage trimmer	Yes	Yes	Yes	Yes	Yes	Yes	For remote mounting

Quadrature droop kit (3 phase)	Yes	Yes	Yes	Yes	Yes	No

Power factor controller - PFC3	Yes	Yes	Yes	Yes	Yes	No	Supplied loose on BC184 & SA465

Remote control interface	Yes	Yes	Yes	Yes	Yes	Yes	For use with power factor controller

Excitation loss module	Yes	Yes	Yes	Yes	No	Yes	Select 12 V or 24 V

Diode failure detector	Yes	Yes	Yes	Yes	No	No

Alternator protection module	Yes	Yes	Yes	No	No	No	Select 380 V or 220 V

Frequency detection module	Yes	Yes	Yes	No	No	No	Select 12 V or 24 V

Dual AVR (manual change over)	Yes	No	Yes	No	No	No	Hard wired spare AVR

Manual voltage regulator	Yes	Yes	No	No	No	No

Line drop compensation	Yes	Yes	Yes	Yes	No	Yes	Counters line drop on long transmission lines
* The excitation circuit breaker supports the overvoltage protection on the MX321 & MA327. Both functions are facilitated by the excitation circuit breaker on the SX421.