Siemens 7RE2800-0CA00
Siemens 7RE2800-0CA00
Siemens 7RE2800-0CA00
Siemens 7RE2800-0CA00
Siemens 7RE2800-0CA00
Siemens 7RE2800-0CA00
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7RE2800-0CA00

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Siemens 7RE2800-0CA00 is a flush-mounted SIPROTEC voltage-balance relay for 100/125 V, 50/60 Hz measuring circuits. It compares two voltage systems and operates without a separate auxiliary supply.
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Technical specifications for 7RE2800-0CA00

  • Manufacturer:
    Siemens
  • Part Number:
    7RE2800-0CA00
  • Product Family:
    Siemens SIPROTEC
  • Product Type:
    SIPROTEC Voltage Balance Relay
  • Stock:
    1
  • Rated measuring voltage:
    100/125 V AC
  • Frequency:
    50/60 Hz
  • Permissible measuring range:
    80–130 V
  • Difference response range:
    18–24 V
  • Operating time:
    Less than 18 ms
  • Auxiliary supply:
    Not required
  • Contact maximum voltage:
    250 V
  • Continuous contact current:
    2 A
  • Mounting:
    Flush mounting
  • Housing:
    7XP2020-2L
  • Terminals:
    Rear connection
  • Protection degree:
    IP51
  • Weight:
    6.614 lbs (3 kg)
  • Estimated shipping dimensions:
    23.2 x 7.5 x 26.7 cm
  • Tariff Code:
    85364900
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Applications Monitoring Safety Compliance

Features:

  • Compares two 100/125 V AC measuring systems at 50 or 60 Hz.
  • Responds within the specified 18–24 V difference range.
  • Uses a flush 7XP2020-2L housing with rear terminals.
The CA00 execution identifies the panel arrangement and terminal direction required for this relay. Measuring voltage and housing details must match the original protection drawing.

Rather than measuring absolute voltage for display, the relay evaluates the relationship between two sources and transfers that result to protection or switching logic through its contacts.

Commissioning should verify polarity, phase association, pickup, reset and the complete downstream trip or permissive path. Panel sealing must also preserve the declared front protection level.

Legacy 7RE2800-0CA00 supply is reviewed against the complete relay and case identity.
Verified resources for Siemens 7RE2800-0CA00:Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Supervise paired bus-voltage circuits before transfer logic is enabled.
  • Detect an unacceptable difference between synchronizing voltage sources.
  • Maintain established electromechanical protection panels that use rear-connected relay cases.
  • The relay continuously compares the two connected measuring-voltage systems.
  • A difference inside the response band initiates the assigned contact action.
  • Pickup and reset values should be recorded during periodic protection testing.
  • Treat every VT secondary terminal as live until isolated, proved and grounded where required.
  • Use the approved test-block sequence so the protection circuit is not unintentionally opened.
  • Secure associated switching equipment before injecting test quantities.
  • Contact loading must remain within the documented 250 V and 2 A continuous limits.
  • The installed case and panel arrangement must preserve the specified IP51 front protection.
  • Protection test records should follow the site's relay-maintenance standard.
Description
7RE2800-0CA00 is an electromechanical SIPROTEC balance relay housed in the 7XP2020-2L case with rear connections. Two 100/125 V AC measuring circuits are compared across the specified 80–130 V working range, and the relay responds when their difference reaches the documented 18–24 V band.

The device is suited to protection and transfer schemes where a rapid indication of voltage inequality is required. With an operating time below 18 ms under stated conditions and no auxiliary supply requirement, the measuring energy itself drives a compact, self-contained decision element for established switchgear panels.

Correct service depends on the VT secondary phasing, case execution, rear-terminal plan, contact duty and panel cut-out all remaining consistent. Test plugs, isolation points and proving methods must follow the site's protection procedure because an error in a live secondary circuit can create both false operation and personnel risk.
Alternative Names
7RE2800-0CA00 7RE2800 0CA00 7RE28000CA00 Siemens 7RE2800-0CA00 7RE2800-0CA00 SIPROTEC 7RE2800 Siemens SIPROTEC Voltage Balance Relay 7RE2800-0CA00 SIPROTEC Voltage Balance Relay
Technical notes
7RE2800-0CA00 is connected to voltage-transformer secondaries; apply the approved isolation and proving sequence, and never disturb an energized measuring circuit during relay removal.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What imbalance causes Siemens 7RE2800-0CA00 to respond?
The official data specifies a voltage-difference response range of 18–24 V on the rated measuring circuits.
Why can Siemens 7RE2800-0CA00 operate without auxiliary DC?
Its electromechanical measuring system derives the operating energy from the connected AC voltage circuits.
How quickly does Siemens 7RE2800-0CA00 change contact state?
The documented operating time is less than 18 ms when the stated test conditions are met.
Which enclosure detail identifies Siemens 7RE2800-0CA00?
The CA00 version uses flush mounting in a 7XP2020-2L housing with rear connections.
What limits apply to Siemens 7RE2800-0CA00 output contacts?
Use the official 250 V maximum and 2 A continuous-contact figures together with the actual switching duty.
Which commissioning evidence should accompany Siemens 7RE2800-0CA00?
Retain the VT phasing check, pickup and reset results, operating-time test and confirmation of the final contact path.