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Product Name: CT/VT Module
Brand Name: GE
Model Number:UR8CH
Country of Origin:USA
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
General Electric |
Model Number: |
UR8CH |
Country of Origin: |
USA |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
Delivery time in stock |
Payment Terms: |
T/T |
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Sales Manager: |
Stella |
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Send an email: |
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Contact in Whatsapp: |
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Part Number |
UR8CH (also UR-8CH) |
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Manufacturer |
General Electric (GE) – GE Multilin / GE Grid Solutions |
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Series |
Universal Relay (UR) Series |
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Product Type |
CT/VT Input Module |
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Phase CT Channels |
3 channels, field-selectable (1A / 5A) |
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Ground CT Channel |
1 channel, field-selectable (1A / 5A) |
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CT Accuracy Class |
0.5% |
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VT Voltage Range (Line-to-Neutral) |
50 – 300 V AC |
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VT Accuracy Class |
0.2% |
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Frequency |
50 / 60 Hz |
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Operating Temperature |
–40°C to +85°C |
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Storage Temperature |
–55°C to +90°C |
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Humidity |
5% – 95% RH (non-condensing) |
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Power Supply |
24 V DC (±10%) drawn from UR backplane |
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Power Consumption |
< 5 W |
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Mounting |
Plug-in module; single UR chassis slot |
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Dimensions (H × W × D) |
4x18.5x17.2cm |
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Weight |
1.22kg |
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Country of Origin |
United States (USA) |
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Compliance |
IEC 61850, IEEE C37.2, UL, CE |
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Configuration Software |
EnerVista UR Setup |
The UR8CH is a dedicated CT/VT input module purpose‑built for GE Multilin Universal Relay (UR) platforms. The UR8CH equips the host relay with three phase current transformers (1A/5A selectable) and one ground CT channel, plus complete voltage transformer (VT) monitoring for all three phases. The UR8CH converts these analog current and voltage signals into digital format for protection logic execution, enabling sophisticated differential and split‑phase protection schemes. Installed into a single UR chassis slot, the UR8CH replaces numerous discrete sensing components, saving panel space while delivering precision measurement and galvanic isolation in demanding utility and industrial substation environments.
Transformer differential protection (87T) for two‑winding and three‑winding power transformers
Generator differential and stator ground fault protection (87G)
Busbar differential protection (87B) in low‑impedance and medium‑voltage configurations
Feeder protection schemes requiring 3‑phase CT inputs plus ground CT channel
Motor protection with concurrent split‑phase current monitoring
Concurrent split‑phase protection for high‑availability industrial motor drives
Power system retrofits where 1A/5A selectable CTs accommodate legacy sensor upgrades
Medium‑voltage switchgear protection as part of IEC 61850‑based substation automation
Utility transmission and distribution line protection with high‑accuracy current/voltage acquisition
4 CT channels (3 phase + 1 ground): Field‑selectable for 1A or 5A secondary rating.
3 VT channels: Monitors all three phases with 0.2% accuracy.
Auto‑sensing: Card automatically informs UR CPU whether channel is 1A/5A CT or 110V/220V VT — no DIP switches.
Differential ready: Supports percentage‑restrained differential (87) with 2nd harmonic blocking and adaptive restraint.
Split‑phase capable: Concurrent independent processing of each phase current for motor protection.
High accuracy: CT Class 0.5%, VT Class 0.2% for metering and protection.
Galvanic isolation: 2 kV RMS channel‑to‑ground isolation.
Hot‑swappable plug‑in: Insert/remove while UR chassis remains powered.
Wide temperature: –40°C to +85°C for harsh environments.
EnerVista UR Setup: Full scaling, channel mapping, and protection assignments managed via software.
Digitises three phase currents, one ground current, and three‑phase voltages from CT/VT secondaries for UR CPU protection algorithms.
Provides analog input backbone for differential protection, enabling detection of internal winding faults with per‑unit mismatch thresholds.
Supplies phase current and voltage data to directional overcurrent elements (67) for fault direction determination.
Enables split‑phase monitoring where each phase is processed independently for turn‑to‑turn fault detection.
Delivers ground current measurement to sensitive ground fault elements (50SG/51SG) in high‑resistance grounded systems.
Supplies synchronism check (25) data by comparing VT readings between generator source and system bus.
Automatically scales CT secondary values — 1A/5A selection eliminates external interposing CTs.
Continuously self‑tests CT/VT input circuitry; asserts diagnostic flag for open circuit or wiring faults.
Streams 80 samples/cycle per channel over SV (IEC 61850‑9‑2LE) to third‑party IEDs in merge unit mode.
Q1: What is the UR8CH used for?
A1: The UR8CH is a CT/VT input module that provides current and voltage sensing to GE Multilin UR series relays for differential, split‑phase, and directional protection schemes.
Q2: How many CT and VT channels does the UR8CH provide?
A2: The UR8CH provides 3 phase CTs (1A/5A selectable), 1 ground CT (1A/5A selectable), and 3 phase VT monitoring channels.
Q3: Is the UR8CH hot‑swappable?
A3: Yes. The UR8CH can be inserted or removed while the UR chassis remains powered, eliminating system downtime for maintenance.
Q4: What accuracy does the UR8CH deliver?
A4: The UR8CH provides Class 0.5% accuracy for CTs and Class 0.2% accuracy for VTs, meeting stringent protection and metering requirements.
Q5: What software configures the UR8CH ?
A5: The UR8CH is configured using GE‘s EnerVista UR Setup software, which manages CT/VT scaling, channel mapping, and all protection element assignments.
Inguiry Now: [email protected]
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