STAMFORD AS440/AS480/AS540/SX460 — analog voltage regulators for self-excited generators
Country: United Kingdom · Model: AS440/AS480/AS540/SX460
The analog thyristor half-wave voltage regulators AS440, AS480 and AS540 for self-excited brushless generators. The load regulation accuracy is ±1.0 %, and the voltage sensing is two-phase. The discontinued SX460 was replaced by the AS440.
- Type
- analog, thyristor half-wave, 2-phase sensing
- Accuracy (with load)
- ±1.0 %
- Supply/sensing AS480
- 100–264 V AC, 1 phase, 50–60 Hz
- Supply
- from the stator winding (self-excited) or an auxiliary winding / EBS
Technical specifications
| Type | analog, thyristor half-wave, 2-phase sensing |
|---|---|
| Accuracy (with load) | ±1.0 % |
| Supply/sensing AS480 | 100–264 V AC, 1 phase, 50–60 Hz |
| Supply | from the stator winding (self-excited) or an auxiliary winding / EBS |
| Technology | surface mount (SMT) |
| AS440 application | standard on S4, HC4, HC5, UC22, UC27 |
| AS480 application | standard on P0, P1; EBS interface |
| AS540 application | S0, S1; auxiliary winding interface |
| SX460 | discontinued, replaced by the AS440 |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The AS440 is built with SMT surface-mount technology, the supply and sensing circuits have separate terminals, and excitation is taken from the stator winding or from an auxiliary winding if a steady-state short-circuit current is needed. It supports a droop current transformer for parallel operation and is standard on the S4 and HC5, and optional on the UC22 and UC27 (in the UC22/UC27 and HC4 datasheets it is named as standard). The AS480 operates from 100–264 V AC, 1 phase, 50–60 Hz, has an interface for the EBS boost system and is standard for the P0 and P1. The AS540 has an auxiliary winding interface and was formerly fitted to the S0 and S1, which now have the digital VITA 01. The frequency sensing circuit protects against operation at reduced speed, and the potting compound protects the board from moisture, salt and sand.
How to choose
The regulator is selected by generator. The AS440 is for the S4, HC4, HC5, UC22 and UC27, the AS480 for the P0 and P1, and the AS540 for the S0 and S1, where the digital VITA 01 is now fitted. If excitation comes from a PMG, the MX321, MX322, MX341 or MX342 are needed, and the VITA 05 gives a digital replacement. The manufacturer advises buying only original regulators from authorized dealers.
Request a price and lead time
STAMFORD AS440/AS480/AS540/SX460 — analog voltage regulators for self-excited generators. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How does the AS440 differ from the SX460?
The SX460 has been discontinued and was replaced by the AS440. The SX460 was previously used on the UC22 and UC27.
Which generators is the AS440 fitted to?
As standard on the S4 and HC5, and optionally on the UC22 and UC27. In the UC22/UC27 and HC4 datasheets it is stated as standard.
What is the supply voltage of the AS480?
100–264 V AC, 1 phase, 50–60 Hz. The regulator is standard for the P0 and P1.
What is the regulation accuracy of the AS regulators?
±1.0 % with load, with two-phase voltage sensing.
Can the AS440 be used for parallel operation?
Yes, it supports a droop current transformer for parallel operation of generators.
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Need a price, lead time or replacement?
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