Cutsforth’s Assurance Monitoring System measures grounding current and shaft voltage at the generator drive-end bearing and provides a unit shaft ground connection. The system features a local digital readout that displays live shaft voltage, ground current, and rope status data, as well as manual test points within the monitoring enclosure that makes it possible for any signal acquired by the system to be measured with hand-held equipment. This data can also be ported directly into a DCS or historian via Modbus or [optional] 4–20 mA outputs for remote viewing, trending, analysis, and alarming.
Voltage:
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±15 V DC
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0–70 V RMS
-
0–100 V 0–Pk
Current:
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±15 A DC
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0–15 A RMS
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0–20 A 0–Pk
Accuracy: ±1 V and 5% of current in specified range
Operating Temperature: –20°C to 55°C (–4°F to 131°F)
Signal Acquisition Rate: Shaft voltage and ground current are sampled at a rate of 100 kS/s
All descriptions in this manual assume that the Assurance Monitoring System is connected via signal wires to Cutsforth’s proprietary shaft-grounding and voltage-sensing hardware with rope wear indicators installed on the generator shaft.
The following resources provide more information on the Assurance Monitoring System and associated equipment.
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Shaft Grounding Assembly Operations Manual
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Series 1: EZDP-2007
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Series 2: EZDP-2035
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Series 3: EZDP-2068
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Installation Planning Guide: EZDP-2126
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Appropriate wiring diagram(s) for installed equipment
|
Catalog Number |
A |
B |
C |
Steel Type |
Door/Body Gauge |
Latch Qty |
|---|---|---|---|---|---|---|
|
SNB-3734 |
11.81 in (300 mm) |
11.81 in (300 mm) |
7.87 in (200 mm) |
Painted Steel, Cold Rolled |
16 |
1 |
Specifications:
|
|
|
Catalog Number |
A |
B |
C |
Steel Type |
Door/Body Gauge |
Latch Qty |
|---|---|---|---|---|---|---|
|
EN4SD12126S16 |
12.0 in (305 mm) |
12.0 in (305 mm) |
6.00 in (152 mm) |
316 Stainless |
16 |
1 |
Specifications:
|
|
|
Plant-supplied power source (AC) |
85–264 VAC, 47–440 Hz, 10 W |
|
Plant-supplied power source (DC) |
20–32 VDC, 10 W |
|
Circuit breaker |
Internal 120 V, 5 A |
|
Circuit draw under normal usage |
Approximately 0.6 A |
Table 1. EU Directive Information – CE Compliance
|
Electro Magnetic Compatibility (EMC) Directive 2014/30/EU |
EN 61326-1:2013 |
|
Low Voltage Directive (LVD) 2014/35/EU |
IEC 61010-1: 2010; EN 61010-1-2010 |
|
RoHS Directive 2011/65/EU |
Large Scale Fixed Installation Exclusion |
Table 2. North America
|
Electro Magnetic Compatibility (EMC) |
Conforms to FCC 47CFR 15: 2022, Certified to CSA Std. ICES-001 2020 |
|
Safety |
Conforms to UL 61010-1: 2012 Ed.3+R: 19-Jul-2019, Certified to CSA C22.2 61010-1: 2012 Ed. 3+U1;U2; A1 |
Table 3. UK Conformity Assessed (UKCA)
|
Electro Magnetic Compatibility (EMC) 2016 |
EN 61326-1:2013 |
|
Electrical Equipment (Safety) Regulations 2016 |
EN 61010-1-2010 |
|
Regulations: Restriction of Hazardous Substances (RoHS) |
Large Scale Fixed Installation Exclusion |
WEEE Directive Statement
Marking for the Waste of Electrical and Electronic Equipment in accordance with Article II of Directive 2012/19/EU (WEEE). The European Directive 2012/19/EU requires marking:
-
That applies to electrical and electronic equipment falling under Annex 1, Category 9 of Directive 2012/19/EU.
-
That serves to clearly identify the producer of the equipment and that the equipment has been put on the market after 13 August 2005.
-
That the crossed out wheeled bin alerts the end user to dispose of this equipment via the special recycling procedure for electrical and electronic equipment that is applicable in the country of use.
-
The shown marking is attached to the product and identifies the product to fall within the scope of this directive.
|
Storage Temperature |
–40°C to 85°C (–40°F to 185°F) |
|
Operating Temperature |
–20°C to 55°C (–4°F to 131°F) |
|
Storage Humidity |
5% RH to 95% RH, noncondensing |
|
Operating Humidity |
10% RH to 90% RH, noncondensing |
|
Maximum Altitude |
2,000 m (6,560 ft) |
|
Installation Location |
For either indoor or outdoor use |
|
Overvoltage Category |
II |
|
Pollution Degree |
2 |