Frontier Power Products - Stamford Generators

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BC range
UC range
HC range
P range
Transformer controlled generators
Automatic voltage regulators
Electronic accessories

The STAMFORD range of synchronous a.c. generators includes 2-pole, 4-pole, and 6-pole generators at low voltage and 4-pole generators at medium and high voltages.

2-pole range from 12 kVA to 43 kVA
4-pole range from 8 kVA to 2800 kVA
6-pole range from 280 kVA to 1600 kVA
4-pole and 6-pole generators are available as marine or industrial units

Stamford Industrial product guide
Stamford Marine product guide

Stamford BCI generator BC Range
The BC 16/18 range of AC generators is available from 5 - 50 kVA.

BCI Industrial range 2 & 4 pole:
- 2 pole 3000 rpm at 50Hz, 3600 rpm at 60Hz
- Self excited control or auxilary winding
- Advanced AVR control
- 2/3 pitch winding standard
- Single or two bearing construction with sealed for life bearings
- Easy access for installation and maintenance
- IP23 protection standard.

BCM Marine range:
- Short circuit maintenance provided by an auxiliary winding
- 12 wire reconnectable windings
- Marine certification available
- IP 23 2/3 pitch windings

Spec sheets
BC 162	120 - 600 V, 12.5 - 31.3 kVA	details
BC 164	110 - 600 V, 6.1 - 20 kVA	details
BC 182	120 - 600 V, 30 - 46.9 kVA	details
BC 184	120 - 600 V, 15 - 50 kVA	details
BCA 162	120 - 480 V, 12.5 - 50 kVA	details
BCA 164	120 - 600 V, 8.1 - 35.6 kVA	details
BCL 164-184	110 - 600 V, 7.5 - 30 kVA	details
BCM184 - marine	220 - 480 V, 16 - 42.8 kVA	details
Please contact our equipment sales dept. for technical or dimensional data

Stamford UCI generator UC Range
The UC 22/27 range of AC generators is available from 40 - 343 kVA.
- 2/3 Pitch windings avoid excessive neutral currents
- Class ‘H’ insulation with severe environmental protection standard
- Single and two bearing construction with dynamic rotor and sealed for life bearings
- Easy access for installation and maintenance
- 12 wire stator/terminal arrangement
- Built to conform with all leading industrial standards
- SX460 AVR standard with 1.0% regulation and 2 phase sensing
- IP 23 standard.

Spec sheets
UC 224	120 - 690 V, 42.5 - 103.8 kVA	details
UC 274	120 - 690 V, 100 - 255 kVA	details
UCD 224	120 - 690 V, 42.5 - 103.8 kVA	details
UCD 274	120 - 690 V, 230 - 343 kVA	details
UCM224 - marine	220 - 480 V, 35 - 92 kVA	details
UCM274 - marine	220 - 480 V, 75 - 225 kVA	details
Please contact our equipment sales dept. for technical or dimensional data

Stamford HC Generator HC Range
The HC 4/7 range of AC generators is available from 250 - 1500 kVA.

HCI Industrial AC generators
- 2/3 winding pitch to avoid excessive neutral currents
- Single or two bearing construction
- Easy access for installation and maintenance
- Built to conform to all leading industrial standards

HCM Marine AC generators
- 2/3 Pitch windings avoid excessive neutral currents
- Class ‘H’ insulation with severe environmental protection standard
- Single and two bearing construction with dynamic rotor and sealed for life bearings
- Easy access for installation and maintenance
- 12 wire stator/terminal arrangement
- Built to conform with all leading marine standards
- MX 341 AVR standard with 1.5% regulation and 2 phase sensing

Spec sheets
HC 4	120 - 690 V, 250 - 475 kVA	details
HC 5	120 - 690 V, 450 - 825 kVA	details
HCK 5	120 - 690 V, 450 - 843 kVA	details
HC 6	120 - 690 V, 800 - 1438 kVA	details
HCM4 - marine	220 - 480 V, 175 - 425 kVA	details
HCM5 - marine	220 - 480 V, 320 - 725 kVA	details
HCM6 - marine	240 - 480 V, 220 - 1275 kVA	details
Please contact our equipment sales dept. for technical or dimensional data

Stamford P7 Generators P Range
The P range of AC generators is available from 1225 - 2750 kVA.

PI7 Industrial AC generators
- 4 pole (1500rpm) 50Hz AC Generators
- 4 pole (1800rpm) 60Hz AC Generators
- 2/3 winding pitch to avoid excessive neutral currents
- Single or two bearing construction
- Easy access for installation and maintenance
- Built to conform to all leading industrial standards

PM7 Marine AC generators
- 2/3 Pitch windings avoid excessive neutral currents
- Class ‘H’ insulation with severe environmental protection standard
- Single and two bearing construction with dynamic rotor and sealed for life bearings
- Easy access for installation and maintenance
- 6 wire stator/terminal arrangement
- Built to conform with all leading marine standards
- MX 321 AVR standard with 0.5% regulation 3 phase rms AVR sensing

Spec sheets
P7	380 - 690 V, 1260 - 2750 kVA	details
P7M - marine	380 - 690 V, 910 - 2480 kVA	details
Please contact our equipment sales dept. for technical or dimensional data

Transformer controlled generators
The STAMFORD range of "series 5" transformers controlled a.c. generators range from 6.25 kVA to 88 kVA. This robust range of generators feature superb motor starting capabilities (1 HP per kW). The voltage regulations for the series 5 generator is + 5 % at 0.8PF.

BCI 16/18 transformer controlled AC generators
- A range of 4-pole, single or 2-bearing transformer controlled generators designed for very high motor starting loads (450 % for up to 7 seconds) where fine voltage regulation is less critical
- Engine adaptors to SAE 1, 2, 3, 4, 5 & 6, and coupling discs to SAE 6-1/2, 7-1/2, 8, 10 & 11-1/2
- Windings are specific to output voltage (single or three phase)
- Voltages available range up to 480 V.
- IP23 enclosure protection standard

UCI22 / UCDI22 transformer controlled AC generators
- A range of 4-pole, single or 2-bearing transformer controlled generators designed for very high motor starting loads (450 % for up to 7 seconds) where fine voltage regulation is less critical
- Engine adaptors to SAE 1, 2, 3, 4 & 5, and coupling discs to SAE 7-1/2, 8, 10, 11-1/2, & 14 available on UCI generators
- UCDI 22 is dedicated to SAE 3/10 & SAE 3/11-1/2 adaptor/disc options
- Windings are specific to output voltage (single or three phase)
- Voltages available range up to 480 V.
- IP22 enclosure protection is standard, IP23 is optional at reduced ratings

Please contact our equipment sales dept. for technical or dimensional data.

Automatic Voltage Regulators
A range of Automatic Voltage Regulators designed to achieve optimum performance from STAMFORD AC generators.

A key feature of all STAMFORD AVR’s is the engine relief load acceptance feature. This is called the Under Frequency Roll Off (UFRO) circuit. It reduces the output voltage when the engine fails to maintain frequency during motor starting. This reduction in power requirement with engine speed assists the Prime Mover to recover speed after application of a heavy load and protects the rotor against over-excitation.

	BC16	BC18	UC22	UC27	HC4	HC5	HC6	P7
SX460	std	std	std	std	n/a	n/a	n/a	n/a
SX440	n/a	n/a	optional	optional	std	std	n/a	n/a
SA465	optional	optional	n/a	n/a	n/a	n/a	n/a	n/a
SX421	n/a	optional	optional	optional	optional	optional	n/a	std
MX341	n/a	n/a	optional	optional	optional	optional	n/a	std
MX321	n/a	n/a	optional	optional	optional	optional	std	optional

Spec sheets
SX460	The standard AVR for generators in the lower power bands (less than 200 kVA). This is a low cost AVR for low-tech applications where paralleling is not a requirement. The voltage regulation is in the order of ± 1.5%*. The UFRO feature operates at a preset point 95% of the operating frequency.	details
SX440	The SX440 AVR is fitted to a generator in the range of 250 – 800 kVA as standard and as an option on generators of 22 –250 kVA . The voltage regulation is in the order of ± 1%*. The UFRO feature operates at a pre-set point 95% of the operating frequency. A range of accessories is available for this AVR including the requisites for parallel operation.	details
SX465	This is a smaller AVR similar in performance to the SX440. The reduced size makes it ideal for mounting inside the smaller terminal box of the BC range of generators. Regulation of ± 1%* , UFRO circuit preset at 95% of operating speed. This AVR is either powered from the output terminals or from an auxiliary winding as fitted to the BC184. Ideal for marine applications and is an economical way to improve motor starting.	details
SX421	This AVR is offered as an alternative to the SX440. It has the advantage of better regulation, ± 0.5%*, UFRO at 95%.of the operating frequency and 3 phase 3 wire sensing ideal for supplying unbalanced loads. Newage electrical accessories are available with this AVR.	details
MX341	The MX341 achieves a voltage regulation of ± 1%*. The UFRO feature operates at a pre-set point 95% of the operating frequency. Short circuit current is maintained for 10 seconds, to allow breaker discrimination to operate, before the AVR shuts down to protect the generator from damage. Accepts all of the Newage range of electronic accessories.	details
MX321	MX321 The MX321 is the top of the range high specification AVR, it is supplied as standard on Frame 6 & 7 generators (800-2000 kVA) and is available as an option on generators in the range of 250-800 kVA. It features ± 0.5%* (RMS) regulation, fully adjustable UFRO, short circuit maintenance for 8-15 seconds. Current limiting may be included to allow control over the amount of short circuit current flowing during short circuits. Accepts all of the Newage range of electronic accessories.	details

Electronic accessories

Accessory	MX321	MX341	SX421	SX440	SA465	SX460
Excitation circuit breaker, for isolation of the excitation system	available	n/a	incl	n/a	n/a	n/a
RFI suppressor kit	available	available	available	available	available	available
Separate voltage trimmer, for remote mounting	available	available	available	available	available	available
Quadrature droop kit*	available	available	available	available	available	n/a
Power factor controller , PFC3	available	available	available	available	available	n/a
Remote control interface , for use with PFC3	available	available	available	available	available	n/a
Excitation loss module , select 12V or 24V	available	available	available	available	available	n/a
Diode failure detector , select 380V or 220V	available	available	available	available	available	n/a
Frequency detection module , select 12V or 24V	available	available	n/a	n/a	n/a	n/a
Dual AVR (manual change over); hard wired spare AVR	available	available	n/a	n/a	n/a	n/a
Manual voltage regulator	available	available	n/a	n/a	n/a	n/a
Line drop compensation, counters line drop on long transmission lines	available	available	available	available	available	n/a
Alternator protection module	available	available	available	available	available	available

* When two or more ac generators are connected in parallel it is necessary to share the mechanical and the electrical loads evenly. The mechanical load sharing is controlled by the engine governors. The electrical load is controlled with the aid of a current transformer that works in conjunction with the AVR (not available on a SX 460 AVR). When the generator is paralleled to the mains; the power factor of the load can also be controlled, with the aid of a Power Factor Controller.