{"id":5021,"date":"2026-04-30T01:23:41","date_gmt":"2026-04-30T01:23:41","guid":{"rendered":"https:\/\/morssmitt.leenweb.nl\/product\/2c73\/"},"modified":"2026-10-07T04:59:44","modified_gmt":"2026-10-07T03:59:44","slug":"2c73","status":"publish","type":"product","link":"https:\/\/morssmitt.com\/es\/product\/2c73\/","title":{"rendered":"2C73"},"content":{"rendered":"<p>\u0084 High sensitivity \u0084 High stability for through faults \u0084 Operating current set using 7 position plug bridge \u0084 Optional 1A or 5A CT input \u0084 Tuned to 50Hz or 60Hz \u0084 25ms operation at 5x setting \u0084 Hand reset mechanical flag \u0084 2 heavy duty N\/O trip contacts \u0084 Rugged attracted armature sensing elements \u0084 Use 3 independent units for 3 phase applications \u0084 Size 2M draw out case Application The 2C73 relay provides high speed differential protection for various items of power system plant including generators, busbars, motors &#038; the individual windings of power transformers. It is also suitable for restricted earth fault protection pplications. a When circulating current protection schemes are subjected to sudden &#038; often asymmetrical growth in system currents due to through faults, the line current transformers can quickly reach saturation. In this condition, variation in transformer magnetizing characteristics can cause large ratio errors with a consequent circuit imbalance &#038; false tripping of the protective elay scheme. r In order to ensure protection stability, a high impedance differential relay set to operate at a slightly higher voltage than that developed in the worst case of the above condition for a through fault current may be used. On a balanced earth fault system for example, this is when one CT of a group is saturated while the others remain unaffected. The saturated CT presents a low impedance path in parallel with the relay, which effectively limits the voltage applied to avoid operation. On internal faults however, this limitation does not exist &#038; voltages of twice the relays ick up settings are easily reached. p The 2C73 relay is a single phase device built in a compact size 2M draw out case suitable for rack and flush mounting. Where 3 phase monitoring is required, 3 single phase units should be employed.<\/p>","protected":false},"featured_media":5022,"template":"","meta":{"_acf_changed":false,"sku":"2C73","external_key":"2C73","parent_external_id":"P-Utility Grade Protection Relays","grandparent_external_id":"GP-Transmission and Primary Distribution","product_type_description":"ChildProduct","product_short_description":"High Impedance Differential Relay","product_long_description":"The 2C73 relay provides high-speed differential protection for power system plant including generators, busbars, motors and the individual windings of power transformers, and is also suitable for restricted earth fault protection. Under through-fault conditions, line current transformers can saturate and cause ratio errors, circuit imbalance and false tripping. To ensure stability, this high impedance differential relay operates at a voltage slightly higher than the worst-case through-fault condition, while still tripping reliably on internal faults. It is a single-phase device in a compact size 2M draw-out case; use three units for three-phase applications.","product_related_products":[],"product_attachments":null,"product_published":true,"product_application":"The 2C73 relay provides high speed differential protection for various items of power system plant including generators, busbars, motors & the individual windings of power transformers. It is also suitable for restricted earth fault protection applications. When circulating current protection schemes are subjected to sudden & often asymmetrical growth in system currents 2C73 depicted in a 2M28 case due to through faults, the line current transformers can quickly reach saturation. In this condition, variation in transformer magnetizing characteristics can cause large ratio errors with a consequent circuit imbalance & false tripping of the protective","product_features":"","product_railway_compliancy":"","filters":[]},"product_categorie":[102,141,70],"product_parent":[40],"class_list":["post-5021","product","type-product","status-publish","has-post-thumbnail","hentry","product_categorie-high-impedance-differential","product_categorie-obsolete-protection-control-products","product_categorie-utility-grade-protection-relays","product_parent-utility-grade-protection-relays"],"acf":[],"_links":{"self":[{"href":"https:\/\/morssmitt.com\/es\/wp-json\/wp\/v2\/product\/5021","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/morssmitt.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/morssmitt.com\/es\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/morssmitt.com\/es\/wp-json\/wp\/v2\/media\/5022"}],"wp:attachment":[{"href":"https:\/\/morssmitt.com\/es\/wp-json\/wp\/v2\/media?parent=5021"}],"wp:term":[{"taxonomy":"product_categorie","embeddable":true,"href":"https:\/\/morssmitt.com\/es\/wp-json\/wp\/v2\/product_categorie?post=5021"},{"taxonomy":"product_parent","embeddable":true,"href":"https:\/\/morssmitt.com\/es\/wp-json\/wp\/v2\/product_parent?post=5021"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}