BB 500MTM02 1MRK001967-AA — Input Transformer Module

Description

Product Overview

500MTM02 1MRK001967-AA is the same card as the 1MRB150020 orders before it, reached through the third of its numbers — and for anyone buying against a plant’s records, this is the one that matters. The module carries four identities: the type designation 500MTM02, the product order code 1MRK001967-AA, the manufacturing code 1MRB150020 with its release field, and the engineering code 1HDF 930512 X010. The type designation is what the rack’s documentation and the plant’s drawings use, the manufacturing code is what a surplus-stock search returns, and the product order code is what an ABB catalogue is indexed by. A sourcing exercise that quotes one layer and searches in another is the commonest way this module is reported as unavailable when it is not.

The 1MRK prefix needs one caution before it is used as a part-number test, because it is not one. In ABB’s protection and control numbering, 1MRK marks the product area, and the string that follows decides what kind of thing has been numbered. The short form — six digits, a hyphen and a two-letter suffix, as here — is an orderable item. The three-group form, such as 1MRK 511 059-BEN, is a technical document: that is the number of the REC 580 terminal manual this article’s technical data comes from, complete with a trailing group that encodes its language edition. Both sorts of string sit in the same prefix family, and both are routinely quoted in the trade as if they were interchangeable. They are not: one buys a module, the other buys a manual.

The suffix is the second place where this order form rewards a careful reader. -AA is a variant pair of letters, and in the neighbouring 1MRK002122 block — codes of the same issuing scheme seen earlier in this series — the strings carry both the variant and a revision element, as -ABr00, -ABr03 and -ABr05. Here there is no revision element at all. Two explanations fit: either this code was issued without one, or the sellers who print it are truncating a longer string. Nothing in the accessible record distinguishes them, and the practical answer is the one that has served throughout this family — reproduce the string exactly as it appears on the plant record and on the unit, and do not tidy it into a shape borrowed from a neighbouring product.

The 1MRK00 block itself carries a useful implication. It is the same block from which the earlier 1MRK002122 and 1MRK002311 codes in this series were issued, which places those modules in the same numbering scheme as this one. The type designations in the 500xxx form are the terminal’s own vocabulary; the 1MRK00 codes are how the product area issues them for ordering. A plant’s spare-parts list will usually hold the 1MRK form because that is what the purchase order carried, while the rack drawings hold 500MTM02 because that is what the module says on its face — and both refer to one card whose fit is decided by neither.

Because fit is decided by the transformer population, none of these three numbers answers the question a bay actually asks. Up to thirteen channels, each populated at ordering as a protection-grade current transformer, a metering-grade current transformer or a potential transformer, at 1 A or 5 A, 63.5 V, 110 V or 220 V, with empty channels reserved for the 500ITM02 isolating transducer or an optical voltage transducer — that population is the specification, and it is recorded in the ordering documentation rather than encoded in any of the strings. ABB’s manual for the REC 580*3.0 terminal, 1MRK 511 059-BEN, devotes a selection table to it precisely because the code cannot express it.

What the trade writes about this card remains detached from all of that: power control module, communication motherboard, main control board, I/O module, controller module, and in one case motor diagnostics with stator winding analysis. None of those descriptions survives the terminal’s own module list, which names this card as the input transformer module and lists the supply modules separately as 500PSM02 and 500PSM03.

Technical Specifications

500MTM02 1MRK001967-AA

Key Features and Advantages

Three numbers, three uses: 500MTM02 for the rack drawing, 1MRK001967-AA for the catalogue, 1MRB150020 for the surplus-stock search. Knowing which layer a document uses prevents a part from being declared unavailable when it is simply indexed elsewhere.

A prefix that is not a part-number test: 1MRK marks the product area, and the short item form is distinguishable from the three-group document form by shape alone — 1MRK001967-AA against 1MRK 511 059-BEN.

A suffix that must be copied, not reconstructed: -AA carries variant letters and no revision element here, while neighbouring codes in the same issuing block carry both. Reproduce what the record says.

A block that ties the series together: 1MRK00 issues the terminal’s modules, which is why codes seen earlier in this series — 1MRK002122, 1MRK002311 — belong to the same numbering scheme as this card.

Documented electrical behaviour rather than claimed behaviour: protection cores at ±0.5 % of In and metering cores at ±0.2 % of In over 0–1.2 In, voltage channels at ±0.2 % Un, thermal headroom of 100×In for one second on protection cores — all from the terminal manual, none of it from a resale page.

A specification the code cannot carry: thirteen channels, each a protection CT, metering CT or potential transformer at stated ratings. The ordering documentation holds it; the number does not.

Applications

Procurement against a plant’s spare-parts list: lists of this vintage quote the 1MRK form because that is what the original purchase order carried, and a supplier searching that form and finding only Chinese resale pages quoting 1MRB will report the item as scarce. Matching the layers is the first step of any successful sourcing exercise.

Feeder and busbar bays in medium-voltage substations: the functional home of the card — currents and voltages entering the bay control terminal through instrument transformers.

Combined protection and metering circuits: protection-grade and metering-grade cores on one module, each kept to its own accuracy class.

Channel-level replacement: transformers fail one at a time, so the usual demand is for a single card configured like the failed one rather than a batch of new modules.

Fleet rationalisation across several bays: one designation, several configurations, and records written in two numbering layers — the situation in which the release field gets examined and the transformer population gets overlooked.

Where it does not fit: motor diagnostics, motor thermal protection, power control or supply duty (500PSM02 and 500PSM03 own that role), communication motherboard or controller duty, or generic I/O duty.

Related Products

1MRB150020R0712 / 1MRB150020R1102 — the manufacturing-code forms of this same module, one engineering code between them; the strings a surplus search will actually return. 1HDF 930512 X010 — the engineering identifier that stays constant across both releases; the layer that answers whether two units are the same hardware. 500AIM02 — the mandatory companion analog input unit, 16 channels at 1.0/1.2 kHz and 6 W. 500ITM02 — the isolating transducer module, 3/8/16 channels of ±5 mA, ±20 mA and ±10 V; may feed an empty channel here and must not share one. 500PSM02 / 500PSM03 (1MRB150038R0001) — the terminal’s supply modules, 60 W and 100 W from 36–312 V DC. 500CPU03 — the terminal’s processor module with two Industry Pack sockets, controller of the internal VME bus. 500MBA02 — the MVB process bus controller module, own processor, 3 W. 500SCM01 — the star coupler module, five optical pairs, 3.5 W. 1MRK002122-ABr00 / 1MRK002311-AAr11 — codes from the same 1MRK00 issuing block seen earlier in this series; the numbering layer this card shares. 500CRB01 / 500CRB02 — the two 21-slot backplanes governing where each module may sit.

Installation and Maintenance

Before installation: translate the record into the rack’s vocabulary before touching hardware. If the plant’s list says 1MRK001967-AA and the unit is marked 500MTM02, that is one card, not two — but the transformer population still has to be matched channel by channel against the single-line diagram, because no number in this family expresses it. Confirm that the 500AIM02 companion is fitted in the rack, and check the terminal’s slot provisions rather than assuming any free position will accept the module.

Installation: the two circuit classes this card lands fail in opposite and dangerous ways. A current-transformer secondary must never be open-circuited with primary current flowing; a voltage-transformer secondary must never be short-circuited, since that removes a protection function without an alarm. Isolate the bay, prove the circuits dead, land cores to the schedule, then check burden before energising — the ratings assume ≤0.05 VA per current input and ≤0.15 VA per voltage phase, and added burden shows up as degraded accuracy rather than as a fault. Where a 500ITM02 shares the analog unit, confirm no channel is fed from both.

Maintenance: injection testing against commissioning values is the only reliable check on accuracy drift, and it is the check that protects a protection decision. Inspect current-circuit terminations for thermal damage, confirm deliberately empty channels have stayed empty, and record both the 1MRK order code and the transformer population together — the first for future orders, the second for future fit.

Warranty and Quality

Every 500MTM02 1MRK001967-AA module is supplied as an input transformer module of ABB’s REC 580 bay control terminal, documented by designation, product order code, manufacturing code and the engineering code 1HDF 930512 X010, with the suffix reproduced exactly as recorded rather than completed into a shape borrowed from a neighbouring code block. Units are inspected for transformer and terminal condition, thermal stress evidence on windings and cores, backplane-interface condition, PCB damage, corrosion and label legibility; verification covers the transformer population actually fitted, insulation between channels and continuity of each populated channel where facilities allow. Electrical data is quoted from ABB’s manual for the terminal, 1MRK 511 059-BEN: current inputs 1 A or 5 A with burden ≤0.05 VA at In, voltage inputs 63.5/110/220 V with burden ≤0.15 VA per phase, protection accuracy ±0.5 % of In and metering ±0.2 % of In over 0–1.2 In, up to thirteen transformers populated at ordering. The circulating descriptions — power control module, communication motherboard, main control board, I/O module, controller module, motor diagnostics — are rejected against the terminal’s own module list, which reserves the supply role for 500PSM02 and 500PSM03. A 12-month repair, replacement or refund commitment applies, subject to configuration match against the bay. Technical support covers what this part actually requires: distinguishing the short item form from the three-group document form within 1MRK, mapping 1MRK001967-AA to 1MRB150020 when a search returns only one layer, reading the transformer population from the unit itself, and keeping a channel from being fed by both 500ITM02 and this card.